Dong Fang Hong 02

Launch data: Designation 05007 / 71018A Launch date 03 Mar 1971 - 12:04 UT Launch site Jiuquan, LA1 Launch vehicle CZ-1(#2) Mission Scientific (Shijian) Earth orbit: Perigee / Apogee  266 x 1826 km Eccentricity   Inclination  69.9 deg Period  106.1 min

Spacecraft data:

Decay:

Mission details:

• The SJ-1 spacecraft is of DFH-1 heritage (DFH = Dong Fang Hong (Red is East) a Chinese communication satellite platform launched April 24, 1970). The SJ-1 satellite carried out particle measurements of cosmic rays and the inner radiation belt.
• The spacecraft is of a spherical structure with a diameter of 1m, completely covered with solar cells. There are 14 pieces of silicon solar cell mounted on the trapezoidal planes of upper and lower hemispherical shells. The satellite is spin-stabilized.
• The spacecraft contains a circular pressurized capsule with shortwave telemetric instruments and the ultra-shortwave beacon transmitter and receiver, as well as a silver-zinc chemical battery. Between the main capsule and outer enclosure there are four auxiliary capsules - referred to as; a) auxiliary capsule 1 with two sets of NiCd batteries and small telemetry equipment; b) auxiliary capsule 2 with the limiter and the phase-shifting adjuster network; c) auxiliary capsule 3 with a 5 cm responder, and d) auxiliary capsule 4 with a 10 cm beacon device. The minisatellite has a mass of 221 kg.
• Mission status: SJ-1, with a design life of 1 year, operated for 8 years. The S/C provided excellent experience in spacecraft operations.

Sensor complement:

• The instruments were: the G-M counter and BE window integrating ionization chamber.
  • The G-M counter was used for detecting cosmic rays and measuring the total flux of protons with energy of more than 16.4 MeV and the total flux of electrons with energy of more than 0.88 MeV.
  • The BE window integrating ionization chamber was used for exploring solar X-rays.