Citation
Abstract
This article modifies a previous analysis to incorporate the actual structure of the command signal system of the Very Large Array (VLA). In particular, in addition to the 1-ms command signal of the previous article, there is a “data invalid” signal that is generated. The command signals are transmitted to the antennas during the period in which the “data invalid” signal is on. This means that the gaps in the received data are really 1.6 ms long rather than I ms long. Simulation results with this taken into account show that the VLA will not support (7, 1/2) convolutionally encoded telemetry at acceptable error rates at any of the Voyager telemetry data rates. VIA will support Voyager encounters provided that either concatenated coding is implemented, VLA is arrayed with another receiving site (such as Goldstone), or VLA is reconfigured so that the gaps are rotated.
Details
- Volume
- 42-72
- Published
- February 15, 1983
- Pages
- 51–60
- File Size
- 551.3 KB