A low Earth orbit ( LEO ) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25. Most of the artificial objects in outer space are in LEO, peaking in number at an altitude around 800 km (500 mi), while the farthest in LEO, before medium Earth orbit (MEO), have an altitude of 2,000 kilometers, about one-third of the radius of Earth and near the beginning of the inner Van Allen radiation belt .
93-569: (Redirected from Return To Flight ) Return to Flight can refer to: Apollo 7 , NASA's first mission after the Apollo 1 fire Apollo 14 , NASA's first mission after the failure of Apollo 13 Falcon 9 Flight 20 Space Shuttle mission STS-26 , NASA's first mission after the Space Shuttle Challenger disaster Space Shuttle mission STS-114 , NASA's first test mission after
186-400: A Lunar Module ). The three astronauts were originally designated for the second crewed Apollo flight, and then as backups for Apollo 1. After the Apollo 1 fire, crewed flights were suspended while the cause of the accident was investigated and improvements made to the spacecraft and safety procedures, and uncrewed test flights made. Determined to prevent a repetition of the fire,
279-570: A domino effect known as Kessler syndrome . NASA's Orbital Debris Program tracks over 25,000 objects larger than 10 cm diameter in LEO, while the estimated number between 1 and 10 cm is 500,000, and the number of particles bigger than 1 mm exceeds 100 million. The particles travel at speeds up to 7.8 km/s (28,000 km/h; 17,500 mph), so even a small impact can severely damage a spacecraft. [REDACTED] This article incorporates public domain material from websites or documents of
372-404: A semi-major axis of 8,413 km (5,228 mi). For circular orbits, this in turn corresponds to an altitude of 2,042 km (1,269 mi) above the mean radius of Earth, which is consistent with some of the upper altitude limits in some LEO definitions. The LEO region is defined by some sources as a region in space that LEO orbits occupy. Some highly elliptical orbits may pass through
465-570: A CM lowered into the Gulf of Mexico from a naval vessel in April 1968, to test how systems would respond to seawater. Further tests were conducted the following month in a tank at Houston. Fires were set aboard a boilerplate CM using various atmospheric compositions and pressures. The results led to the decision to use 60 percent oxygen and 40 percent nitrogen within the CM at launch, which would be replaced with
558-424: A TV program clearly interfered." Eisele agreed in his memoirs, "We were preoccupied with preparations for that critical exercise and didn't want to divert our attention with what seemed to be trivialities at the time. ... Evidently the earth people felt differently; there was a real stink about the hotheaded, recalcitrant Apollo 7 crew who wouldn't take orders." French and Burgess wrote, "When this point
651-476: A call sign other than the mission designation would be that of Apollo 9 , which carried a LM that would separate from it and then re-dock, necessitating distinct call signs for the two vehicles. Since it flew in low Earth orbit and did not include a LM, Apollo 7 was launched with the Saturn IB booster rather than the much larger and more powerful Saturn V . That Saturn IB was designated SA-205, and
744-418: A circumlunar crewed mission. NASA's Lunar Module (LM) was suffering delays, and Apollo Program Spacecraft Manager George Low proposed that if Apollo 7 was a success, that Apollo 8 go to lunar orbit without a LM. The acceptance of Low's proposal raised the stakes for Apollo 7. According to Stafford, Schirra "clearly felt the full weight of the program riding on a successful mission and as
837-457: A collision risk to the many LEO satellites. No human spaceflights other than the lunar missions of the Apollo program (1968-1972) and the 2024 Polaris Dawn have taken place beyond LEO. All space stations to date have operated geocentric within LEO. A wide variety of sources define LEO in terms of altitude . The altitude of an object in an elliptic orbit can vary significantly along
930-480: A hard time once but you certainly survived that and have done extremely well since ... I am frankly, very proud to call you a friend." The insignia for the flight shows a command and service module with its SPS engine firing, the trail from that fire encircling a globe and extending past the edges of the patch symbolizing the Earth-orbital nature of the mission. The Roman numeral VII appears in
1023-455: A long time until they launched. They spent long periods at Downey. Simulators were constructed at Houston's Manned Spacecraft Center and at KSC in Florida. Once these were available for use, the crew had difficulty finding enough time to do everything, even with the help of the backup and support crews; the crew often worked 12 or 14 hours per day. After the CM was completed and shipped to KSC,
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#17327800304691116-533: A lower pressure of pure oxygen within four hours, as providing adequate fire protection. Other boilerplate spacecraft were subjected to drops to test parachutes, and to simulate the likely damage if a CM came down on land. All results were satisfactory. During the run-up to the mission, the Soviets sent uncrewed probes Zond 4 and Zond 5 (Zond 5 carried two tortoises ) around the Moon, seeming to foreshadow
1209-484: A prime crew without having served as a backup, Cunningham was troubled by the fact that a second Earth orbital test flight, dubbed Apollo 2, seemed unnecessary if Apollo 1 was successful. He learned later that Director of Flight Crew Operations Deke Slayton , another of the Mercury Seven who had been grounded for medical reasons and supervised the astronauts, planned, with Schirra's support, to command
1302-482: A repeat of the accident which killed the first crew. Schirra's crew would test the life support , propulsion , guidance and control systems during this "open-ended" mission (meaning it would be extended as it passed each test). The duration was limited to 11 days, reduced from the original 14-day limit for Apollo 1. The backup crew consisted of Stafford as commander, John W. Young as command module pilot, and Eugene A. Cernan as lunar module pilot. They became
1395-506: A result became more openly critical and more sarcastic." Throughout the Mercury and Gemini programs, McDonnell Aircraft engineer Guenter Wendt led the spacecraft launch pad teams, with ultimate responsibility for condition of the spacecraft at launch. He earned the astronauts' respect and admiration, including Schirra's. However, the spacecraft contractor had changed from McDonnell (Mercury and Gemini) to North American (Apollo), so Wendt
1488-543: A satellite into a LEO, and a satellite there needs less powerful amplifiers for successful transmission, LEO is used for many communication applications, such as the Iridium phone system . Some communication satellites use much higher geostationary orbits and move at the same angular velocity as the Earth as to appear stationary above one location on the planet. Unlike geosynchronous satellites , satellites in low orbit have
1581-441: A small field of view and can only observe and communicate with a fraction of the Earth at a given time. This means that a large network (or constellation ) of satellites is required to provide continuous coverage. Satellites at lower altitudes of orbit are in the atmosphere and suffer from rapid orbital decay , requiring either periodic re-boosting to maintain stable orbits, or the launching of replacements for those that re-enter
1674-549: A stable low Earth orbit is about 7.8 km/s (4.8 mi/s), which translates to 28,000 km/h (17,000 mph). However, this depends on the exact altitude of the orbit. Calculated for a circular orbit of 200 km (120 mi) the orbital velocity is 7.79 km/s (4.84 mi/s), but for a higher 1,500 km (930 mi) orbit the velocity is reduced to 7.12 km/s (4.42 mi/s). The launch vehicle's delta-v needed to achieve low Earth orbit starts around 9.4 km/s (5.8 mi/s). The pull of gravity in LEO
1767-433: A subset of LEO. These orbits, with low orbital inclination , allow rapid revisit times over low-latitude locations on Earth. Prograde equatorial LEOs also have lower delta-v launch requirements because they take advantage of the Earth's rotation. Other useful LEO orbits including polar orbits and Sun-synchronous orbits have a higher inclinations to the equator and provide coverage for higher latitudes on Earth. Some of
1860-482: A test stand. Although the astronauts were confident it would work, they were concerned it might fire in an unexpected manner, necessitating an early end to the mission. The burns would be computed from the ground but the final work in maneuvering up to the S-IVB would require Eisele to use the telescope and sextant to compute the final burns, with Schirra applying the ship's reaction control system (RCS) thrusters. Eisele
1953-412: A third spaceflight, beginning to focus on his post-NASA career. Flying the first mission after the fire changed things: "Wally Schirra was being pictured as the man chosen to rescue the manned space program. And that was a task worthy of Wally's interest." Eisele noted, "coming on the heels of the fire, we knew the fate and future of the entire manned space program—not to mention our own skins—was riding on
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#17327800304692046-423: Is considered objectively—that in a front-loaded mission the rendezvous, alignment, and engine tests should be done before television shows—it is hard to argue with him [Schirra]." Although Slayton gave in to Schirra, the commander's attitude surprised flight controllers. On Day 8, after being asked to follow a new procedure passed up from the ground that caused the computer to freeze, Eisele radioed, "We didn't get
2139-593: Is dramatized in the 1998 miniseries From the Earth to the Moon episode "We Have Cleared the Tower", with Mark Harmon as Schirra, John Mese as Eisele, Fredric Lehne as Cunningham and Nick Searcy as Slayton. Low Earth orbit The term LEO region is used for the area of space below an altitude of 2,000 km (1,200 mi) (about one-third of Earth's radius). Objects in orbits that pass through this zone, even if they have an apogee further out or are sub-orbital , are carefully tracked since they present
2232-496: Is only slightly less than on the Earth's surface. This is because the distance to LEO from the Earth's surface is much less than the Earth's radius. However, an object in orbit is in a permanent free fall around Earth, because in orbit the gravitational force and the centrifugal force balance each other out. As a result, spacecraft in orbit continue to stay in orbit, and people inside or outside such craft continuously experience weightlessness . Objects in LEO orbit Earth between
2325-552: The Apollo Guidance Computer at MIT . Each crew member spent 160 hours in CM simulations, in some of which Mission Control in Houston participated live. The "plugs out" test—the test that had killed the Apollo 1 crew—was conducted with the prime crew in the spacecraft, but with the hatch open. One reason the Apollo 1 crew had died was because it was impossible to open the inward-opening hatch before
2418-444: The service propulsion system (SPS, the spacecraft's main engine) and the CM's guidance systems could perform a rendezvous in orbit, and later make a precision reentry and splashdown. In addition, there were a number of specific objectives, including evaluating the communications systems and the accuracy of onboard systems such as the propellant tank gauges. Many of the activities aimed at gathering these data were scheduled for early in
2511-441: The Apollo 7 crew. Barbara Eden , star of the popular comedy series I Dream of Jeannie , which featured fictional astronauts among its regular characters, appeared with Schirra, Eisele and Cunningham. Schirra parlayed the head cold he contracted during Apollo 7 into a television advertising contract as a spokesman for Actifed , an over-the-counter version of the medicine he took in space. The Apollo 7 mission
2604-543: The Apollo command and service module's flightworthiness, allowing Apollo 8's flight to the Moon to proceed just two months later. John T. McQuiston wrote in The New York Times after Eisele's death in 1987 that Apollo 7's success brought renewed confidence to NASA's space program. According to Jones, "Three weeks after the Apollo 7 crew returned, NASA administrator Thomas Paine green-lighted Apollo 8 to launch in late December and orbit
2697-544: The Apollo program followed. Soon after the fire, Slayton asked Schirra, Eisele and Cunningham to fly the first mission after the pause. Apollo 7 would use the Block II spacecraft designed for the lunar missions, as opposed to the Block I CSM used for Apollo 1, which was intended only to be used for the early Earth-orbit missions, as it lacked the capability of docking with a lunar module. The CM and astronauts' spacesuits had been extensively redesigned, to reduce any chance of
2790-604: The CSM had separated. After station keeping with the S-IVB for 20 minutes, Schirra let it drift away, putting 76 miles (122 km) between the CSM and it in preparation for the following day's rendezvous attempt. The astronauts also enjoyed a hot lunch, the first hot meal prepared on an American spacecraft. Schirra had brought instant coffee along over the opposition of NASA doctors, who argued it added nothing nutritionally. Five hours after launch, he reported having, and enjoying, his first plastic bag full of coffee. The purpose of
2883-557: The LEO region near their lowest altitude (or perigee ) but are not in a LEO orbit because their highest altitude (or apogee ) exceeds 2,000 km (1,243 mi). Sub-orbital objects can also reach the LEO region but are not in a LEO orbit because they re-enter the atmosphere . The distinction between LEO orbits and the LEO region is especially important for analysis of possible collisions between objects which may not themselves be in LEO but could collide with satellites or debris in LEO orbits. The mean orbital velocity needed to maintain
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2976-628: The Moon. Apollo 7 had delivered NASA from its trial by fire—it was the first small step down a path that would lead another crew , nine months later, to the Sea of Tranquility ." General Sam Phillips , the Apollo Program Manager, said at the time, "Apollo 7 goes into my book as a perfect mission. We accomplished 101 percent of our objectives." Kraft wrote, "Schirra and his crew did it all—or at least all of it that counted ... [T]hey proved to everyone's satisfaction that
3069-474: The RCS system to keep the spacecraft stable during a test, "I wish you would find out the idiot's name who thought up this test. I want to find out, and I want to talk to him personally when I get back down." Eisele joined in, "While you are at it, find out who dreamed up 'P22 horizon test'; that is a beauty also." A further source of tension between Mission Control and the crew was that Schirra repeatedly expressed
3162-523: The SPS engine was one of the most reliable we'd ever sent into space. They operated the Command and Service Modules with true professionalism." Eisele wrote, "We were insolent, high-handed, and Machiavellian at times. Call it paranoia, call it smart—it got the job done. We had a great flight." Kranz stated in 1998, "we all look back now with a longer perspective. Schirra really wasn't on us as bad as it seemed at
3255-843: The Saturn V tested on Apollo 6, had leaked. The Saturn IB was a two-stage rocket, with the second stage an S-IVB similar to the third stage of the Saturn V, the rocket used by all later Apollo missions. The Saturn IB was used after the close of the Apollo Program to bring crews in Apollo CSMs to Skylab , and for the Apollo–Soyuz Test Project . Apollo 7 was the only crewed Apollo mission to launch from Cape Kennedy Air Force Station's Launch Complex 34 . All subsequent Apollo and Skylab spacecraft flights (including Apollo–Soyuz) were launched from Launch Complex 39 at
3348-622: The South Pacific Ocean and the crew's names appear on a wide black arc at the bottom. The patch was designed by Allen Stevens of Rockwell International . In January 1969, the Apollo 7 command module was displayed on the NASA float in the inauguration parade of President Richard M. Nixon . The Apollo 7 astronauts rode in an open car. After being transferred to the Smithsonian Institution in 1970,
3441-575: The Space Shuttle Columbia disaster Space Shuttle mission STS-121 , NASA's second test mission following the Columbia disaster ISRO 's successful launch of GSLV -D5 with indigenously developed CE-7.5 cryogenic rocket engine Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Return to Flight . If an internal link led you here, you may wish to change
3534-433: The atmosphere. The effects of adding such quantities of vaporized metals to Earth's stratosphere are potentially of concern but currently unknown. The LEO environment is becoming congested with space debris because of the frequency of object launches. This has caused growing concern in recent years, since collisions at orbital velocities can be dangerous or deadly. Collisions can produce additional space debris, creating
3627-535: The craft's onboard radar receiver was able to lock onto a ground-based transmitter, again showing a CSM in lunar orbit could keep contact with a LM returning from the Moon's surface. Throughout the remainder of the mission, the crew continued to run tests on the CSM, including of the propulsion, navigation, environmental, electrical and thermal control systems. All checked out well; according to authors Francis French and Colin Burgess , "The redesigned Apollo spacecraft
3720-471: The crew spent long periods monitoring the construction of their Apollo command and service modules (CSM). Training continued over much of the 21-month pause that followed the Apollo 1 disaster. Apollo 7 was launched on October 11, 1968, from Cape Kennedy Air Force Station , Florida, and splashed down in the Atlantic Ocean eleven days later. Extensive testing of the CSM took place, and also
3813-455: The denser part of the atmosphere and below the inner Van Allen radiation belt . They encounter atmospheric drag from gases in the thermosphere (approximately 80–600 km above the surface) or exosphere (approximately 600 km or 400 mi and higher), depending on orbit height. Satellites in orbits that reach altitudes below 300 km (190 mi) decay quickly due to atmospheric drag. Equatorial low Earth orbits ( ELEO ) are
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3906-476: The docking maneuver with the lunar module on Moon-bound missions prior to extracting the combined craft. Cunningham reported that the hinged SLA panels on the S-IVB had not fully opened, which CAPCOM Tom Stafford likened to the " angry alligator " from his Gemini 9A flight. Partially open panels would have presented a collision hazard on flights with an LM, so on subsequent missions the SLA panels were jettisoned after
3999-445: The east. Launching under these weather conditions was in violation of safety rules, since in the event of a launch vehicle malfunction and abort, the CM might be blown back over land instead of making the usual water landing. Apollo 7 was equipped with the old Apollo 1-style crew couches, which provided less protection than later ones. Schirra later related that he felt the launch should have been scrubbed, but managers waived
4092-407: The entire Apollo program. When he departed the spacecraft area as the pad was evacuated prior to launch, after Cunningham said, "I think Guenter's going", Eisele responded "Yes, I think Guenter went." The Apollo 7 spacecraft included Command and Service Module 101 (CSM-101), the first Block II CSM to be flown. The Block II craft had the capability of docking with a LM, though none
4185-644: The fire raced through the cabin; this was changed for Apollo 7. Command modules similar to that used on Apollo 7 were subjected to tests in the run-up to the mission. A three-astronaut crew ( Joseph P. Kerwin , Vance D. Brand and Joe H. Engle ) was inside a CM that was placed in a vacuum chamber at the Manned Spaceflight Center in Houston for eight days in June 1968 to test spacecraft systems. Another crew ( James Lovell , Stuart Roosa and Charles M. Duke ) spent 48 hours at sea aboard
4278-602: The first active astronaut to divorce, followed by a quick remarriage, and an indifferent performance as backup CMP for Apollo 10. He resigned from the Astronaut Office in 1970 though he remained with NASA at the Langley Research Center in Virginia until 1972, when he was eligible for retirement. Cunningham was made the leader of the Astronaut Office's Skylab division. He related that he
4371-647: The first generation of Starlink satellites used polar orbits which provide coverage everywhere on Earth. Later Starlink constellations orbit at a lower inclination and provide more coverage for populated areas. Higher orbits include medium Earth orbit (MEO), sometimes called intermediate circular orbit (ICO), and further above, geostationary orbit (GEO). Orbits higher than low orbit can lead to early failure of electronic components due to intense radiation and charge accumulation. In 2017, " very low Earth orbits " ( VLEO ) began to be seen in regulatory filings. These orbits, below about 450 km (280 mi), require
4464-457: The first live television broadcast from an American spacecraft. Despite tension between the crew and ground controllers, the mission was a complete technical success, giving NASA the confidence to send Apollo 8 into orbit around the Moon two months later. In part because of these tensions, none of the crew flew in space again, though Schirra had already announced he would retire from NASA after
4557-406: The first three hours of flight, the astronauts performed two actions which simulated what would be required on a lunar mission. First, they maneuvered the craft with the S-IVB still attached, as would be required for the burn that would take lunar missions to the Moon. Then, after separation from the S-IVB, Schirra turned the CSM around and approached a docking target painted on the S-IVB, simulating
4650-567: The flight, his retirement from NASA and the Navy, effective July 1, 1969. The other two crew members had their spaceflight careers stunted by their involvement in Apollo 7; by some accounts, Kraft told Slayton he was unwilling to work in future with any member of the crew. Cunningham heard the rumors that Kraft had said this and confronted him in early 1969; Kraft denied making the statement "but his reaction wasn't exactly outraged innocence." Eisele's career may also have been affected by becoming
4743-507: The flight. Apollo 7 fulfilled Apollo 1's mission of testing the CSM in low Earth orbit , and was a significant step towards NASA's goal of landing astronauts on the Moon. Schirra, one of the original " Mercury Seven " astronauts, graduated from the United States Naval Academy in 1945. He flew Mercury-Atlas 8 in 1962, the fifth crewed flight of Project Mercury and the third to reach orbit, and in 1965
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#17327800304694836-516: The focus of the crew's training shifted to Florida, though they went to Houston for planning and technical meetings. Rather than return to their Houston homes for the weekend, they often had to remain at KSC in order to participate in training or spacecraft testing. According to former astronaut Tom Jones in a 2018 article, Schirra, "with indisputable evidence of the risks his crew would be taking, now had immense leverage with management at NASA and North American, and he used it. In conference rooms or on
4929-586: The high-pressure oxygen system with stainless steel, replacement of flammable materials with non-flammable (including changing plastic switches for metal ones) and, for crew protection in the event of a fire, an emergency oxygen system to shield them from toxic fumes, as well as firefighting equipment. After the Gemini 3 craft was dubbed Molly Brown by Grissom, NASA forbade naming spacecraft. Despite this prohibition, Schirra wanted to name his ship "Phoenix," but NASA refused him permission. The first CM to be given
5022-406: The launch to proceed despite the winds, saying "The mission pushed us to the wall in terms of risk." Jones said, "This prelaunch dispute was the prelude to a tug of war over command decisions for the rest of the mission." Lack of sleep and Schirra's cold probably contributed to the conflict between the astronauts and Mission Control that surfaced from time to time during the flight. The testing of
5115-399: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Return_to_Flight&oldid=1005757400 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Apollo 7 Apollo 7 (October 11–22, 1968)
5208-502: The medal twice before, for his Mercury and Gemini missions). Therefore, NASA administrator Michael D. Griffin decided to belatedly award the medals to the crew in October 2008, "[f]or exemplary performance in meeting all the Apollo 7 mission objectives and more on the first crewed Apollo mission, paving the way for the first flight to the Moon on Apollo 8 and the first crewed lunar landing on Apollo 11." Only Cunningham
5301-638: The medals. He also presented NASA's highest honor, the Distinguished Service Medal , to recently retired NASA administrator James E. Webb , for his "outstanding leadership of America's space program" since the beginning of Apollo. Johnson also invited the crew to the White House, and they went there in December 1968. Despite the difficulties between the crew and Mission Control, the mission successfully met its objectives to verify
5394-494: The mission if he gained medical clearance. When this was not forthcoming, Schirra remained in command of the crew, and in November 1966, Apollo 2 was cancelled and Schirra's crew assigned as backup to Grissom's. Thomas P. Stafford —assigned at that point as the backup commander of the second orbital test—stated that the cancellation followed Schirra and his crew submitting a list of demands to NASA management (Schirra wanted
5487-410: The mission to include a lunar module and a CM capable of docking with it), and that the assignment as backups left Schirra complaining that Slayton and Chief Astronaut Alan Shepard had destroyed his career. On January 27, 1967, Grissom's crew was conducting a launch-pad test for their planned February 21 mission, when a fire broke out in the cabin, killing all three men. A complete safety review of
5580-547: The mission's operational aspects. Pogue spent time modifying procedures. The support crew also filled in when the primary and backup crews were unavailable. CAPCOMs, the person in Mission Control responsible for communicating with the spacecraft (then always an astronaut) were Evans, Pogue, Stafford, Swigert, Young and Cernan. Flight directors were Glynn Lunney , Gene Kranz and Gerry Griffin . According to Cunningham, Schirra originally had limited interest in making
5673-400: The mission, so that if the mission was terminated prematurely, they would already have been completed, allowing for fixes to be made prior to the next Apollo flight. Apollo 7, the first crewed American space flight in 22 months, launched from Launch Complex 34 at 11:02:45 am EDT (15:02:45 UTC ) on Friday, October 11, 1968. During the countdown, the wind was blowing in from
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#17327800304695766-542: The nearby Kennedy Space Center. Launch Complex 34 was declared redundant and decommissioned in 1969, making Apollo 7 the last human spaceflight mission to launch from the Cape Air Force Station in the 20th century. The main purposes of the Apollo 7 flight were to show that the Block II CM would be habitable and reliable over the length of time required for a lunar mission, to show that
5859-497: The official announcement on March 25, 1966, Eisele sustained a shoulder injury that would require surgery. Instead, Roger Chaffee was given the position and Eisele was reassigned to Schirra's crew. Schirra, Eisele, and Cunningham were first named as an Apollo crew on September 29, 1966. They were to fly a second Earth orbital test of the Apollo Command Module (CM). Although delighted as a rookie to be assigned to
5952-482: The onboard television camera prior to the rendezvous, citing the cold, that the crew had not eaten, and that there was already a very full schedule. The rendezvous was complicated by the fact that the Apollo 7 spacecraft lacked a rendezvous radar, something the Moon-bound missions would have. The SPS, the engine that would be needed to send later Apollo CSMs into and out of lunar orbit, had been fired only on
6045-426: The orbit. Even for circular orbits , the altitude above ground can vary by as much as 30 km (19 mi) (especially for polar orbits ) due to the oblateness of Earth's spheroid figure and local topography . While definitions based on altitude are inherently ambiguous, most of them fall within the range specified by an orbit period of 128 minutes because, according to Kepler's third law , this corresponds to
6138-426: The pictures were of poor quality and were never broadcast). According to Jones, "these apparently amiable astronauts delivered to NASA a solid public relations coup." Daily television broadcasts of about 10 minutes each followed, during which the crew held up more signs and educated their audience about spaceflight; after the return to Earth, they were awarded a special Emmy for the telecasts. Later on October 14,
6231-400: The prime crew of Apollo 10 . Ronald E. Evans , John L. 'Jack' Swigert , and Edward G. Givens were assigned to the support crew for the mission. Givens died in a car accident on June 6, 1967, and William R. Pogue was assigned as his replacement. Evans was involved in hardware testing at Kennedy Space Center (KSC). Swigert was the launch capsule communicator (CAPCOM) and worked on
6324-518: The recovery ship USS Essex . The mission's duration was 10 days, 20 hours, 9 minutes and 3 seconds. After the mission, NASA awarded Schirra, Eisele and Cunningham its Exceptional Service Medal in recognition of their success. On November 2, 1968, President Lyndon Johnson held a ceremony at the LBJ Ranch in Johnson City, Texas, to present the astronauts with
6417-402: The rendezvous was to demonstrate the CSM's ability to match orbits with and rescue a LM after an aborted lunar landing attempt, or following liftoff from the lunar surface. This was to occur on the second day; but by the end of the first, Schirra had reported he had a cold, and, despite Slayton coming on the loop to argue in favor, declined Mission Control's request that the crew power up and test
6510-418: The results that you were after. We didn't get a damn thing, in fact ... you bet your ass ... as far as we're concerned, somebody down there screwed up royally when he laid that one on us." Schirra later stated his belief that this was the one main occasion when Eisele upset Mission Control. The next day saw more conflict, with Schirra telling Mission Control after having to make repeated firings of
6603-478: The rule and he yielded under pressure. Liftoff proceeded flawlessly; the Saturn IB performed well on its first crewed launch and there were no significant anomalies during the boost phase. The astronauts described it as very smooth. The ascent made the 45-year-old Schirra the oldest person to that point to enter space, and, as it proved, the only astronaut to fly Mercury, Gemini and Apollo missions. Within
6696-472: The seven-minute broadcast, the crew showed off the spacecraft and gave the audience views of the southern United States. Before the close, Schirra held another sign, "Keep those cards and letters coming in folks", another old-time radio tag line that had been used recently by Dean Martin . This was the first live television broadcast from an American spacecraft ( Gordon Cooper had transmitted slow scan television pictures from Faith 7 in 1963, but
6789-454: The spacecraft assembly line, Schirra got his way." The Apollo 7 crew spent five hours in training for every hour they could expect to remain aboard if the mission went its full eleven days. In addition, they attended technical briefings and pilots' meetings, and studied on their own. They undertook launch pad evacuation training, water egress training to exit the vehicle after splashdown, and learned to use firefighting equipment. They trained on
6882-706: The spacecraft was loaned to the National Museum of Science and Technology , in Ottawa , Ontario. It was returned to the United States in 2004. Currently, the Apollo 7 CM is on loan to the Frontiers of Flight Museum at Love Field in Dallas , Texas. On November 6, 1968, comedian Bob Hope broadcast one of his variety television specials from NASA's Manned Spacecraft Center in Houston to honor
6975-446: The success or failure of Apollo 7." Given the circumstances of the fire, the crew initially had little confidence in the staff at North American Aviation 's plant at Downey, California , who built the Apollo command modules, and they were determined to follow their craft every step of the way through construction and testing. This interfered with training, but the simulators of the CM were not yet ready, and they knew it would be
7068-463: The television resulted in a disagreement between the crew and Houston. Schirra stated at the time, "You've added two burns to this flight schedule, and you've added a urine water dump; and we have a new vehicle up here, and I can tell you at this point, TV will be delayed without any further discussion until after the rendezvous." Schirra later wrote, "we'd resist anything that interfered with our main mission objectives. On this particular Saturday morning
7161-447: The time. ... Bottom line was, even with a grumpy commander, we got the job done as a team." None of the Apollo 7 crew members flew in space again. According to Jim Lovell, "Apollo 7 was a very successful flight—they did an excellent job—but it was a very contentious flight. They all teed off the ground people quite considerably, and I think that kind of put a stop on future flights [for them]." Schirra had announced, before
7254-412: The use of novel technologies for orbit raising because they operate in orbits that would ordinarily decay too soon to be economically useful. A low Earth orbit requires the lowest amount of energy for satellite placement. It provides high bandwidth and low communication latency . Satellites and space stations in LEO are more accessible for crew and servicing. Since it requires less energy to place
7347-436: The view that the reentry should be conducted with their helmets off. He perceived a risk that their eardrums might burst due to the sinus pressure from their colds, and they wanted to be able to pinch their noses and blow to equalize the pressure as it increased during reentry. This would have been impossible wearing the helmets. Over several days, Schirra refused advice from the ground that the helmets should be worn, stating it
7440-480: Was a civilian, aged 36, serving in the Marine Corps reserves with a rank of major, at the time of Apollo 7. He received degrees in physics from UCLA , a B.A. in 1960 and an M.A. in 1961. Both Eisele and Cunningham were selected as part of the third group of astronauts in 1963. Eisele was originally slotted for a position on Gus Grissom 's Apollo 1 crew along with Ed White , but days prior to
7533-427: Was better than anyone had dared to hope." Eisele found that navigation was not as easy as anticipated; he found it difficult to use Earth's horizon in sighting stars due to the fuzziness of the atmosphere, and water dumps made it difficult to discern which glistening points were stars and which ice particles. By the end of the mission, the SPS engine had been fired eight times without any problems. One difficulty that
7626-419: Was encountered was with the sleep schedule, which called for one crew member to remain awake at all times; Eisele was to remain awake while the others slept, and sleep during part of the time the others were awake. This did not work well, as it was hard for crew members to work without making a disturbance. Cunningham later remembered waking up to find Eisele dozing. Schirra was angered by NASA managers allowing
7719-551: Was flown on Apollo 7. The spacecraft also included the launch escape system and a spacecraft-lunar module adapter (SLA, numbered as SLA-5), though the latter included no LM and instead provided a mating structure between the SM and the S-IVB 's Instrument Unit, with a structural stiffener substituted for the LM. The launch escape system was jettisoned after S-IVB ignition, while the SLA
7812-419: Was his prerogative as commander to decide this, though Slayton warned him he would have to answer for it after the flight. Schirra stated in 1994, "In this case I had a cold, and I'd had enough discussion with the ground, and I didn't have much more time to talk about whether we would put the helmet on or off. I said, essentially, I'm on board, I'm commanding. They could wear all the black armbands they wanted if I
7905-535: Was informally offered command of the first Skylab crew, but when this instead went to Apollo 12 commander Pete Conrad , with Cunningham offered the position of backup commander, he resigned as an astronaut in 1971. Schirra, Eisele and Cunningham were the only crew, of all the Apollo, Skylab and Apollo–Soyuz missions, who had not been awarded the Distinguished Service Medal immediately following their missions (though Schirra had received
7998-496: Was left behind on the spent S-IVB when the CSM separated from it in orbit. Following the Apollo 1 fire, the Block II CSM was extensively redesigned—more than 1,800 changes were recommended, of which 1,300 were implemented for Apollo 7. Prominent among these was the new aluminum and fiberglass outward-opening hatch, which the crew could open in seven seconds from within, and the pad crew in ten seconds from outside. Other changes included replacement of aluminum tubing in
8091-648: Was lost or if I lost my hearing. But I had the responsibility for getting through the mission." No helmets were worn during the entry. Director of Flight Operations Christopher C. Kraft demanded an explanation for what he believed was Schirra's insubordination from the CAPCOM, Stafford. Kraft later said, "Schirra was exercising his commander’s right to have the last word, and that was that." Apollo 7 splashed down without incident at 11:11:48 UTC on October 22, 1968, 200 nautical miles (230 mi; 370 km) SSW of Bermuda and 7 nautical miles (8 mi; 13 km) north of
8184-438: Was not the pad leader for Apollo 1. So adamant was Schirra in his desire to have Wendt back as pad leader for his Apollo flight, that he got his boss Slayton to persuade North American management to hire Wendt away from McDonnell, and Schirra personally lobbied North American's launch operations manager to change Wendt's shift from midnight to day so he could be pad leader for Apollo 7. Wendt remained as pad leader for
8277-635: Was startled by the violent jolt caused by activating the SPS. The thrust caused Schirra to yell, "Yabba dabba doo!" in reference to The Flintstones cartoon. Schirra eased the craft close to the S-IVB, which was tumbling out of control, successfully completing the rendezvous. The first television broadcast took place on October 14. It began with a view of a card reading "From the Lovely Apollo Room high atop everything", recalling tag lines used by band leaders on 1930s radio broadcasts. Cunningham served as camera operator with Eisele as emcee. During
8370-438: Was still alive at the time as Eisele had died in 1987 and Schirra in 2007. Eisele's widow accepted his medal, and Apollo 8 crew member Bill Anders accepted Schirra's. Other Apollo astronauts, including Neil Armstrong , Buzz Aldrin , and Alan Bean , were present at the award ceremony. Kraft, who had been in conflict with the crew during the mission, sent a conciliatory video message of congratulations, saying: "We gave you
8463-561: Was the command pilot for Gemini 6A . He was a 45-year-old captain in the Navy at the time of Apollo 7. Eisele graduated from the Naval Academy in 1952 with a B.S. in aeronautics. He elected to be commissioned in the Air Force, and was a 38-year-old major at the time of Apollo 7. Cunningham joined the U.S. Navy in 1951, began flight training the following year, and served in a Marine flight squadron from 1953 to 1956, and
8556-470: Was the fifth Saturn IB to be flown—the earlier ones did not carry crews into space. It differed from its predecessors in that stronger propellant lines to the augmented spark igniter in the J-2 engines had been installed, so as to prevent a repetition of the early shutdown that had occurred on the uncrewed Apollo 6 flight; postflight analysis had shown that the propellant lines to the J-2 engines, also used in
8649-502: Was the first crewed flight in NASA 's Apollo program , and saw the resumption of human spaceflight by the agency after the fire that had killed the three Apollo 1 astronauts during a launch rehearsal test on January 27, 1967. The Apollo 7 crew was commanded by Walter M. Schirra , with command module pilot Donn F. Eisele and Lunar Module pilot R. Walter Cunningham (so designated even though Apollo 7 did not carry
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