Space Communications and Navigation Program: Difference between revisions

Revision as of 22:58, 30 June 2022

Revision as of 09:09, 7 August 2022

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===Spectra===

The Space Network communicates with spacecraft using [[S-band]], [[Ku-band]],<ref name="SNUG1">{{cite book| title =Space Network User's Guide (SNUG), 2.3, Elements of the SN | edition = Rev 9| last = NASA| first = Exploration and Space Communications Projects Division |author2=Goddard Space Flight Center | yeardate = August 2007 | publisher = National Aeronautics and Space Administration| id =450-SNUG}}</ref> and [[Ka-band]] with planned laser/optical communications.

The Deep Space Network communicates with spacecraft using S-band, [[X-band]], and [[Ka-band]].

===Modulation===

SN uses [[phase-shift keying]] and [[phase modulation]] of the [[carrier signal]].<ref name="SNUG2">{{cite book| title =Space Network User's Guide (SNUG), 6.2 SSA Forward Services, and 6.2.3 Phase Modulation (PM) Signal Parameters| edition = Rev 9| last = NASA| first = Exploration and Space Communications Projects Division |author2=Goddard Space Flight Center | yeardate = August 2007 | publisher = National Aeronautics and Space Administration| id =450-SNUG}}</ref>

===Encoding===

The Space Network (used for near-Earth communications) supports the following encoding schemes:<ref name="SNUG3">{{cite book| title =Space Network User's Guide (SNUGx)| edition = Rev 9| last = NASA| first = Exploration and Space Communications Projects Division |author2=Goddard Space Flight Center | yeardate = August 2007 | publisher = National Aeronautics and Space Administration| id =450-SNUG}}</ref>

* [[BPSK]]

* [[QPSK]]/[[SQPSK]]