STS-70 was the 21st flight of the

Space Shuttle The Space Shuttle is a retired, partially reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program na ...

''Discovery'', and the last of 7 shuttle missions to carry a

Tracking and Data Relay Satellite A tracking and data relay satellite (TDRS) is a type of communications satellite that forms part of the Tracking and Data Relay Satellite System (TDRSS) used by NASA and other United States government agencies for communications to and fro ...

(TDRS). This was the first shuttle mission controlled from the new mission control center room at the Johnson Space Center in Houston. STS-70 was also the first flight of the new Block 1 orbiter main engine, designed to improve both engine performance and safety. The mission was launched from

Kennedy Space Center The John F. Kennedy Space Center (KSC, originally known as the NASA Launch Operations Center), located on Merritt Island, Florida, is one of the National Aeronautics and Space Administration's (NASA) ten field centers. Since December 1968 ...

in Florida on 13 July 1995, only six days after the landing of sister ship ''Atlantis'', marking the fastest turnaround between flights in the history of the program.

Crew

Preparations and Launch

STS-70 had originally moved ahead of STS-71 because of a delay in the launch of the Russian Spektr laboratory module to the Russian space station Mir. However, on 31 May 1995 shuttle managers assessed damage to the External Tank of STS-70 caused by nesting flicker woodpeckers. The damage consisted of about 71 holes (ranging in size from 4 inches in diameter to 1/2 inch in diameter) in the ETs thermal protection foam insulation. Technicians installed safeguards against additional damage. On 2 June, NASA managers decided to delay the launch of ''Discovery'' in order to make repairs to the insulation, and STS-71 was moved ahead of STS-70. ''Discovery'' was rolled back to the VAB on 8 June, and was returned to the pad on 15 June. Launch occurred 13 July 1995 at 9:41:55.078 a.m. EDT. The launch window was 2 hours 30 min. The hatch was closed at 8:13am EDT and the count proceeded smoothly until T-31 sec. The count was held for 55 seconds at T-31 sec by the Booster Range Safety Engineer (CBRS) Tod Gracom at the LCC C-5 Console due to fluctuations seen on the external tank automatic gain control (AGC) ET range safety system receiver. Launch Commit Criteria contingency procedures were worked and the count then proceeded on schedule. STS-70 marked the maiden flight of the new Block 1 orbiter main engine. Engine number 2036 featured the new high-pressure liquid oxygen turbopump, a two-duct powerhead, baffleless main injector, single-coil heat exchanger and start sequence modifications. The Block I engine flew in the number one position on ''Discovery''. The other two engines were of the existing Phase II design.

Mission Highlights

The primary mission was the launch and deployment of the 7th Tracking and Data Relay Satellite (

TDRS-G TDRS-7, known before launch as TDRS-G, is an American communications satellite, of first generation, which is operated by NASA as part of the Tracking and Data Relay Satellite System. It was constructed by TRW as a replacement for TDRS-B, which ...

) by means of the two-stage

Inertial Upper Stage The Inertial Upper Stage (IUS), originally designated the Interim Upper Stage, was a two-stage, solid-fueled space launch system developed by Boeing for the United States Air Force beginning in 1976 for raising payloads from low Earth orbit to h ...

(IUS)

solid rocket A solid-propellant rocket or solid rocket is a rocket with a rocket engine that uses solid propellants Rocket propellant is the reaction mass of a rocket. This reaction mass is ejected at the highest achievable velocity from a rocket engine ...

. It was built by TRW and weighs about . The satellite was ejected from ''Discovery's'' cargo bay exactly on time at 2:55 p.m. CDT, approximately six hours into the flight. The release of the satellite was overseen by Mission Specialists Don Thomas and Mary Ellen Weber. About 15 minutes later, ''Discovery's'' Commander Tom Henricks fired the shuttle's engines to raise the orbit and move away from the vicinity of the satellite and the IUS. At about 3:55 p.m., the IUS fired the first of two burns that would put TDRS-G into its proper, 22,000-mile-high geostationary orbit above the central Pacific Ocean at 178 degrees West longitude. The deployment operations utilized three separate control centers; the White Sands ground station controlled the TDRS, the JSC Mission Control Center (MCC) controlled the shuttle, and the Inertial Upper Stage (IUS) control center at Onizuka Air Force Base in Sunnyvale California controlled the booster stage. Once it reached its destination, the fully deployed satellite had a wingspan of 57 ft. The TDRS was the sixth placed in operational use.

TDRS-1 TDRS-1, known before launch as TDRS-A, was an American communications satellite, operated by NASA as part of the Tracking and Data Relay Satellite System. It was constructed by TRW and launched by on its maiden flight, STS-6. History While o ...

was launched aboard

STS-6 STS-6 was the sixth NASA Space Shuttle mission and the maiden flight of the . Launched from Kennedy Space Center on April 4, 1983, the mission deployed the first Tracking and Data Relay Satellite, TDRS-1, into orbit, before landing at Edwards A ...

on 1983-04-04 with a scheduled lifetime of seven years. The second satellite,

TDRS-B TDRS-B was an American communications satellite, of first generation, which was to have formed part of the Tracking and Data Relay Satellite System. It was destroyed in 1986 when the disintegrated 73 seconds after launch. Launch TDRS-B was la ...

, was

lost Lost may refer to getting lost, or to: Geography *Lost, Aberdeenshire, a hamlet in Scotland * Lake Okeechobee Scenic Trail, or LOST, a hiking and cycling trail in Florida, US History *Abbreviation of lost work, any work which is known to have bee ...

aboard ''Challenger'' on mission

STS-51-L STS-51-L was the 25th mission of the NASA Space Shuttle program and the final flight of Space Shuttle ''Challenger''. Planned as the first Teacher in Space Project flight in addition to observing Halley's Comet for six days and performing a ...

TDRS-3 TDRS-3, known before launch as TDRS-C, is an American communications satellite, of first generation, which is operated by NASA as part of the Tracking and Data Relay Satellite System. It was constructed by TRW, and is based on a custom satellit ...

was deployed from

STS-26 STS-26 was the 26th NASA Space Shuttle mission and the seventh flight of the orbiter ''Discovery''. The mission launched from Kennedy Space Center, Florida, on September 29, 1988, and landed four days later on October 3, 1988. STS-26 was decla ...

TDRS-4 TDRS-4, known before launch as TDRS-D, is an American communications satellite, of first generation, which was operated by NASA as part of the Tracking and Data Relay Satellite System from 1989 until 2011. It was constructed by TRW, based on a ...

from STS-29,

TDRS-5 TDRS-5, known before launch as TDRS-E, is an American communications satellite, of first generation, which is operated by NASA as part of the Tracking and Data Relay Satellite System. It was constructed by TRW is based on a custom satellite bu ...

from STS-43 and

TDRS-6 TDRS-6, known before launch as TDRS-F, is an American communications satellite, of first generation, which is operated by NASA as part of the Tracking and Data Relay Satellite System. It was constructed by TRW, and is based on a custom satelli ...

was deployed by

STS-54 STS-54 was a NASA ''Space Transportation System'' (Space Shuttle) mission using Space Shuttle ''Endeavour''. This was the third flight for ''Endeavour'', and was launched on January 13, 1993 with Endeavour returning to the Kennedy Space Center ...

. The on-orbit TDRS network was rearranged and included two fully operational spacecraft occupying the TDRS East and West slots, one on-orbit fully functional spare, TDRS-1, which was nearly depleted having exceeded its planned lifetime, and the partially operational TDRS-3 spacecraft dedicated to supporting the

Compton Gamma Ray Observatory The Compton Gamma Ray Observatory (CGRO) was a space observatory detecting photons with energies from 20 k eV to 30 GeV, in Earth orbit from 1991 to 2000. The observatory featured four main telescopes in one spacecraft, covering X-ra ...

and providing coverage an area that can't be seen by the other satellites known as the Zone of Exclusion.

Additional Payloads and Experiments

Secondary objectives of the mission were to fulfill the requirements of the Physiological and Anatomical Rodent Experiment / National Institutes of Health-Rodents (PARE/NIH-R); Bioreactor Demonstration System (BDS), Commercial Protein Crystal Growth (CPCG); Space Tissue Loss/National Institutes of Health-Cells (STL/NIH-C); Biological Research in Canisters (BRIC); Shuttle Amateur Radio Experiment-II (SAREX-II), Visual Function Tester-4 (VFT-4); Hand-Held, Earth Oriented, Real-Time, Cooperative, User-Friendly, Location-Targeting and Environmental System (HERCULES); Microcapsules in Space-B (MIS-B); Windows Experiment (WINDEX); Radiation Monitoring Equipment-III (RME-III); and the Military Applications of Ship Tracks (MAST). The Bioreactor Demonstration System was designed to use ground-based and space-bioreactor systems to grow individual cells into organized tissue that is morphologically and functionally similar to the original tissue or organ. The BDS was composed of a device developed at the Johnson Space Center that used a rotating cylinder to suspend cells and tissues in a growth medium, simulating some aspects of microgravity. The system, which was already used extensively in ground-based research, also provided for gas and nutrient exchange. The purpose of the flight experiment was to demonstrate the performance of the bioreactor in actual microgravity. As such, the primary goal was to assess the fluid dynamic characteristics of the bioreactor in microgravity. A club membership patch from the world famous Coney Island Polar Bear Club was carried on this mission.

Landing

Landing opportunities at The Kennedy Space Center at 7:54 am EDT and 9:31 am 21 July 1995 were waved off due to a buildup of ground fog over the Shuttle Landing Facility. Flight Director Rich Jackson directed the five STS-70 astronauts to remain aloft for another day after poor visibility prevented ''Discoverys homecoming on the two consecutive landing opportunities. Discovery's astronauts were informed that their landing had been waved off for the day at 7:10am CDT after astronaut Steve Oswald, flying weather reconnaissance in a Shuttle Training Aircraft over the landing strip, reported that he could not see the three-mile-long runway from his vantage point. STS-70 landed at the Kennedy Space Center on 22 July 1995 at 8:02 a.m. EDT on Runway 33. Nose gear touchdown occurred at 8:02:11 am EDT (Mission Elapsed Time of 8 days 22 hours 20 minutes and 16 seconds) with wheels stop at 8:02:57 am (MET of 8 d 22 h 21 min 2 s). An earlier KSC landing opportunity at 6:26 am EDT was waved off due to marginal yet improving weather conditions at KSC.KSC Press Release 71-95,PAO, 1995

Image Gallery

Image:TDRS-G at KSC.jpg, TDRS-G satellite. Image:STS-70 Mating - GPN-2000-000976.jpg, ''Discovery'' being lowered into position to be mated with its External Fuel tank. Image:STS-70 Rollout - GPN-2000-000974.jpg, STS-70 Rollout on its Crawler Transporter with Mobile Launcher Platform to Launch Pad 39B Image:Space Shuttle STS-70 Launch DSC00001.jpg, Space Shuttle ''Discovery'' STS-70 Launch. Taken with one of the first digital cameras: a

Nikon E2 The Nikon E series, co-developed with Fujifilm, are autofocus 1.3 megapixel professional grade quasi- full frame ( 35mm) Nikon F-mount digital single lens reflex cameras (DSLR) manufactured by Nikon since 1995. The E series included the ''Nikon E ...

. Image:STS070-701-070 Moonrise.jpg, Moonrise viewed from the orbiter. Image:STS070-386-027 Thruster.jpg, Thruster firing photographed in support of WINDEX experiment. Image:STS070-705-094.jpg, Dune fields in Algeria. Image:S070 TDRSG3.jpg, TDRS moving away following deployment. Image:STS070-372-004 Crest.jpg, Toothbrush and tube of toothpaste floating in microgravity.

Notes

External links

NASA mission summary

{{DEFAULTSORT:STS-070 Space Shuttle missions Spacecraft launched in 1995