 | SERT
Credit - NASA
|
Other Designations: Space Electric Rocket Test. Class: Technology. Type: Ion engine. Destination: Sun Synchronous Orbit. Nation: USA. Agency: NASA. Electric ion engine tests. Typical orbit: 1037 km x 1044 km at 99 degrees inclination. Mass: 1,404 kg (3,095 lb).
SERT Chronology - 1970 February 4 - SERT 2 - Launch Site: Vandenberg. Launch Complex: SLC2E. Launch Vehicle: Delta. Mass: 1,404 kg (3,095 lb). Perigee: 1,039 km (645 mi). Apogee: 1,046 km (649 mi). Inclination: 99.20 deg. Period: 106.00 min.
Space Electric Rocket Test; the ion engines aboard were operated until 1981. The SERT 2 development program started in 1966 and included thruster ground tests of 6742 hours and 5169 hours duration. A prototype version of the SERT 2 spacecraft was ground-tested for a period of 2400 hours with an operating ion engine. In addition to diagnostic equipment and related ion engine hardware, the spacecraft had two identical 15 cm diameter, mercury ion engines. Flight objectives included in-space operation for a period of 6 months, measurement of thrust, and demonstration of electromagnetic compatibility. The thruster maximum power level was 0.85 kW, and this provided operation at a 28 mN thrust level at 4200 s specific impulse. Flight data were obtained from 1970 to 1981 with an ion engine operating intermittently in one of three different modes, namely, HV ion extraction, discharge chamber operation only, or just neutralizer operation. Major results were that two mercury engines thrusted for periods of 3781 hours and 2011 hours. Test duration was limited due to shorts in the ion optical system. Thrust measured in space and on the ground agreed within the measurement uncertainties. Up to 300 thruster restarts were demonstrated. One power-processing unit accumulated nearly 17,900 hours during the course of the mission. Additionally, the ion propulsion system was electromagnetically compatible with all other spacecraft systems.
Bibliography:- McDowell, Jonathan, Jonathan's Space Home Page (launch records), Harvard University, 1997-present. Web Address when accessed: http://www.planet4589.org/jsr.html.
- JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Web Address when accessed: http://msl.jpl.nasa.gov/home.html.
- NASA Report,
- NASA Report, Development of The Sert I Spacecraft Summary Report, Web Address when accessed: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19660008296_1966008296.pdf.
- NASA Report, Development and Flight History of SERT 2 Spacecraft, Web Address when accessed: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19920019740_1992019740.pdf.
- NASA Report, Comparative in-flight thrust measurements of the SERT 2 ion thruster, Web Address when accessed: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700033381_1970033381.pdf.
- NASA Report, Thrust measurement of SERT I ion thrustors, Web Address when accessed: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19660013633_1966013633.pdf.
- NASA Report, Results From SERT 1 Ion Rocket Flight Test, Web Address when accessed: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700072262_1970072262.pdf.
Contact us with any corrections, additions, or comments.
Conditions for use of drawings, pictures, or other materials from this site..
To contact astronauts or cosmonauts.
© Mark Wade, 1997 - 2008 except where otherwise noted.
|
|