The TDRS-I satellite
FROM NASA PRESS KIT
Posted: March 6, 2002
The first replenishment satellite, TDRS-H, launched June 30, 2000 from Cape Canaveral Air Force Station, Fla. aboard an Atlas II rocket. NASA acceptance occurred October 17, 2001.
TDRS-I will augment the TDRS' existing S-band and Ku-band frequencies by adding Ka-band capability, adding flexibility and providing higher data rates at a more favorable and less heavily used frequency band that is less susceptible to interference from an increasingly busy radio environment.
Two 15-foot steerable antennas will support the International Space Station with high-resolution digital television, and dump enormous volumes of data at rates up to 300 megabits/second - 5,000 times faster than the average 56K home computer modem.
TDRS-I features a new, Multiple-Access (MA) system*, which can support up to five user spacecraft simultaneously and at higher data rates than the original TDRS fleet.
(*BSS recently modified the Multiple Access (MA) antenna aboard TDRS-I and -J to prevent a performance shortfall, which occurred on TDRS-H. Testing of the modified MA antenna aboard TDRS-I is complete and confirms that it meets specification.)
Dimensions: 68 feet (21 meters) long with solar arrays deployed, 43 feet (13 meters) wide with antennas deployed.
Weight: 7,011 at lift-off (3,180 kilograms); 3,918 pounds (1,777 kilograms) estimated beginning of life on-orbit.
Power: Silicon solar cell arrays that generate 2,300 watts; nickel-hydrogen batteries supply payload power during eclipses.
S-band single access (SSA) -
S-band multiple access (MA) -
Ku-band single access (KuSA) -
Ka-band single access (KaSA) -
Mission Lifetime - TDRS-H, -I and -J each have an intended mission lifetime of 11 years, with expendables (fuel) for up to 15 years.
Pre/Post-Acceptance Testing - Boeing Satellite Systems is responsible for pre-acceptance testing, which will be performed from NASA's White Sands Complex in N.M. while the satellite is in a geosynchronous orbit at 150 degrees West longitude. After NASA acceptance, TDRS-I will undergo post-acceptance testing, performed from the White Sands Complex and under the guidance of Goddard's Mission Services Program Office.
Relocation of the Spacecraft - NASA will relocate TDRS-9 to an operational slot, after completion of NASA's post-acceptance testing.
Launch Vehicle - Lockheed Martin Atlas IIA rocket
Launch Site - Launch Complex 36, Cape Canaveral Air Force Station, Fla.
Launch Date and Time - 5:39 p.m. EST at the beginning of a 40-minute launch window, which extends to 6:19 p.m. EST.
Spacecraft Separation - Launch+30 minutes
Acquisition of Signal - Launch+65 minutes, via a ground station in Canberra, Australia.
Cost - Total cost for the TDRS-H, -I and -J spacecraft and White Sands Complex modifications is approximately $485 million; or about $840 million for the entire program (e.g., three satellites, expendable launch vehicles, White Sands Complex renovations and NASA program costs).
Mission Oversight - Goddard's Mission Services Program Office will manage the day-to-day operations of TDRS-9.
Flight data file
Vehicle: Atlas 2A (AC-143)
Launch date: March 8, 2002
Launch window: 5:39-6:19 p.m. EST (2239-2319 GMT
Launch site: SLC-36A, Cape Canaveral AFS, Fla.
Satellite broadcast: GE-2, Trans. 9, C-band
Launch timeline - Chart with times and descriptions of events to occur during the launch.
Ground track - See the trajectory the rocket will follow during its flight.
Launch windows - Available windows for possible future launch dates of TDRS-I.
Atlas 2A vehicle data - Overview of the rocket to be used in this launch.
Atlas index - A directory of our previous Atlas launch coverage.
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