Citation
Abstract
Deep-space optical communication, which can provide a high-capacity downlink, is planned for future Deep Space Network (DSN) operations. It is envisioned that in addition to this new capability, RF communications will continue to be used for standard-capacity downlink and uplink. Since both links will exist in the future DSN, it is natural to ask whether the two ground stations might be combined into a single unit to result in cost benefits. Further, significant operational and cost benefits can result from a simple co-location of the RF and optical facilities at the existing DSN sites. These same benefits apply whether the RF and optical ground stations are combined or remain separated but co-located. There are a number of significant and unique technical challenges that must be addressed in the design of a combined RF and optical ground terminal. These are related to the coexistence of RF and optical surfaces, the impact of the optical components on the very-highperformance RF system, and RF/optical signal separation. Operation of the optical terminal without a radome implies technical challenges in terms of mirror materials, cleanliness, and stray radiation. Structural deformations of the antenna, which are nearly negligible for the RF signal, are significant for the optical system and must be addressed. This article describes recent work in assessing and addressing the technical challenges associated with a combined RF/optical ground station.
Keywords
Details
- Volume
- 42-181
- Published
- May 15, 2010
- Pages
- 1–38
- File Size
- 17.2 MB