Citation
Abstract
Telemetry ranging is a proposed alternative to conventional two-way ranging for determining the two-way time delay between a Deep Space Station (DSS) and a spacecraft. The advantage of telemetry ranging is that the ranging signal on the uplink is not echoed to the downlink, so that telemetry alone modulates the downlink carrier. The timing information needed on the downlink, in order to determine the two-way time delay, is obtained from telemetry frames. This article describes the phase and timing estimates required for telemetry ranging, and how two-way range is calculated from these estimates. It explains why the telemetry ranging architecture does not require the spacecraft transponder to have a high-frequency or highquality oscillator, and it describes how a telemetry ranging system can be infused in the Deep Space Network.
Keywords
Details
- Volume
- 42-203
- Published
- November 15, 2015
- Pages
- 1–20
- File Size
- 470.6 KB