The main objective of EGG is to measure the three components of the GGT (Gravity-Gradient Tensor). The EGG instrument is based on an ambient temperature, closed loop, capacitive accelerometer concept. EGG is a three-axis gradiometer consisting of 3 pairs of three-axis servo-controlled capacitive accelerometers on an ultra-stable carbon-carbon structure. The EGG is also used as a main sensor in the DFACS.
The SSTI consists of an advanced dual-frequency, 12-channel GPS
receiver and an L-band antenna. The receiver is capable of
simultaneously acquiring signals broadcast from up to 12 spacecraft
in the GPS constellation. The SSTI instrument delivers, at 1Hz,
so-called pseudo-range and carrier-phase measurements on both GPS
frequencies, as well as a real-time orbit navigation solution.
Proceedings and Presentations:
Related (Key) Documentation
Related Software Tools