Citation
Abstract
It is predicted that the spin-stabilized Helios spacecraft when communicating via its low-gain antenna to the deep space stations of the Deep Space Network will affect the observed radio frequency doppler signal which is normally only a function of the spacecraft-to-Earth radial velocity. The effect is due largely to the spin modulation created by the spacecraft rotation and the right-circularlypolarized element of the spacecraft antenna system that is physically offset several radio frequency wavelengths from the rotational axis. The discussion develops the expected effects to the general doppler equation, and expressions for the resultant one-way uplink and downlink and two-way coherent doppler frequency cases are presented. dt r r
Details
- Volume
- 42-23
- Published
- October 15, 1974
- Pages
- 87–91
- File Size
- 475.5 KB