SOHO Recovery Updates
2 September 1998

Pipe heating continues. All the pipe heaters are currently switched on in sun-heating mode. Three of the Dual Thruster Modules (DTMs) appear to be thawed. Pressures in the tank and two propulsion branches are as predicted and steady.

A test was performed on receiver #1 on the +Z low gain antenna. Lock was not achieved.

A four step approach has been adopted for the attitude recovery:

  1. Gyro test
  2. Thruster test
  3. Despin of the S/C to low rate
  4. Triggering of ESR
Details are being discussed by AOCS experts at GSFC, MMS-F Toulouse and MMS-UK Bristol. The schedule for these activities depends on the completion of thawing of the propulsion system and the time needed to fully recharge the batteries.

Bernhard Fleck
SOHO Project Scientist
European Space Agency
bfleck@esa.nascom.nasa.gov

Last modification: September 08, 1998
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