# US 10,374,692 B1 · Persistent LEO spacecraft communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,692 B1 - Document ID: US10374692B1 - Status: Granted - Kind: B1 - Application number: 15/729,536 - Filed: 2017-10-10 - Granted: 2019-08-06 - Earliest claimed: 2017-03-27 - Assignees: Lockheed Martin Corporation - Applicants: Lockheed Martin Corporation - Inventors: David John Banerian; Christopher C. Bianchi; Arthur Paolella - Web page: https://patentgrep.com/patent/US10374692B1 ## CPC - H04B 7/18508: {with satellite system used as relay, i.e. aeronautical mobile satellite service} - H04B 7/19: Earth-synchronous stations - H04B 7/195: Non-synchronous stations - H04B 7/204: Multiple access - H04B: TRANSMISSION ## Abstract A system includes a Mobile User Objective System (MUOS) geostationary earth orbit (GEO)-based communication satellites (ComSat) to provide a persistent and on-demand communication links between multiple LEO space vehicles, their associated air and/or ground users and operations centers. The system further includes one or more LEO space vehicles that can communicate with the GEO-based MUOS ComSats using UHF communication links. Each of the LEO space vehicles includes radio circuitry to enable communicating over an ultra-high frequency (UHF) band used by the MUOS GEO communication link in compliance with the MUOS Wideband Code-Division Multiple-Access WCDMA waveform standard or other user defendable waveforms. ## Claims ### Claim 1 A system comprising: a geostationary earth orbit (GEO)-based communication satellite (ComSat) configured to provide a communication link, the communication link being a persistent and on-demand communication link; and one or more space vehicles configured to communicate with the GEO-based ComSat using the communication link employing a Mobile User Objective System (MUOS) compliant wideband code-division multiple-access (WCDMA) waveform within an ultra-high frequency (UHF) band, wherein: the one or more space vehicles are configured to travel around the Earth in a Low Earth Orbit (LEO), and each of the one or more space vehicles includes radio circuitry configured to enable communicating over the UHF band used by the communication link. ### Claim 2 (depends on 1) The system of claim 1, wherein the one or more space vehicles comprise an LEO satellite constellation. ### Claim 3 (depends on 1) The system of claim 1, wherein the GEO ComSat comprises a MUOS ComSat of a MUOS GEO constellation. ### Claim 4 (depends on 3) The system of claim 3, further comprising ground-based MUOS interface facilities configured to communicate with ground teleports associated with the MUOS ComSat via at least one of secret Internet protocol router network (SIPRNET) or non-secured Internet protocol router network (NIRNET). ### Claim 5 (depends on 4) The system of claim 4, wherein the ground teleports are configured to communicate with the MUOS ComSat through a feeder link. ### Claim 6 (depends on 4) The system of claim 4, further comprising a session manager unit configured to communicatively link the MUOS interface facilities with a domain service manager linked with a mission operations center associated with the one or more space vehicles. ### Claim 7 (depends on 1) The system of claim 1, wherein the GEO-based communication satellite is configured to receive mission data from the one or more space vehicles and communicate the mission data to ground-based units including aircrafts, hand held terminals, ships, unmanned aerial vehicles (UAVs). ### Claim 8 (depends on 1) The system of claim 1, wherein the communication link comprises at least one of a low probability-of-intercept (LPI) and a low probability-of-detection (LPD) UHF link that is capable of supporting up to about 384 kilo-bits per second (Kbps). ### Claim 9 (depends on 1) The system of claim 1, further comprising ground control stations configured to access the one or more space vehicles via at least one of SIPRNET or NIRNET through standard IP access. ### Claim 10 A method comprising: configuring a Geostationary Earth Orbit (GEO)-based Communication Satellite (ComSat) to provide a communication link, the communication link being a persistent and on-demand communication link; and configuring one or more space vehicles to communicate with the GEO-based ComSat using the communication link employing a Mobile User Objective System (MUOS) compliant wideband code-division multiple-access (WCDMA) waveform within an ultra-high frequency (UHF) band by: providing radio circuitry configured to enable communicating over the UHF band used by the communication link, wherein the one or more space vehicles are enabled to travel around a Low Earth Orbit. ### Claim 11 (depends on 10) The method of claim 10, wherein the one or more space vehicles comprise an LEO space vehicle, and wherein configuring the GEO ComSat comprises configuring a MUOS ComSat of a MUOS GEO constellation. ### Claim 12 (depends on 11) The method of claim 11, further comprising configuring ground-based MUOS interface facilities to communicate with ground teleports and control centers associated with the MUOS ComSat via at least one of Secret Internet Protocol Router Network (SIPRNET) or Non-secured Internet Protocol Router Network (NIRNET). ### Claim 13 (depends on 12) The method of claim 12, further comprising configuring a session manager unit to communicatively link the MUOS interface facilities with a domain service manager linked with a mission operations center associated with the one or more space vehicles. ### Claim 14 (depends on 10) The method of claim 10, further comprising configuring the GEO-based communication satellite to receive mission data from the one or more space vehicles and to communicate the mission data to ground-based units including aircrafts, hand held terminals, ships, Unmanned Aerial Vehicles (UAVs). ### Claim 15 (depends on 10) The method of claim 10, further comprising configuring the communication link to use a MUOS compliant wideband Code-Division Multiple-Access (WCDMA) waveform within the UHF band. ### Claim 16 (depends on 10) The method of claim 10, further comprising configuring the communication link as at least one of a low probability-of-intercept (LPI) and a Low Probability-of-Detection (LPD) UHF link that is capable of supporting up to about 384 kilo-bits per second (Kbps). ### Claim 17 (depends on 10) The method of claim 10, further comprising configuring ground control stations to access the one or more space vehicles via at least one of secret SIPRNET or NIRNET through standard IP access. ### Claim 18 A satellite communication system, the system comprising: one or more Low Earth Orbit (LEO)-space vehicles configured to communicate with a Geostationary Earth Orbit (GEO)-based Communication Satellite (ComSat) using a persistent and on-demand communication link employing a Mobile User Objective System (MUOS) compliant wideband code-division multiple-access (WCDMA) waveform within an ultra-high frequency (UHF) band; and one or more ground control stations configured to access the one or more LEO space vehicles through an IP access network, wherein: each of the one or more LEO space vehicles includes radio circuitry configured to enable communicating over the UHF band used by the communication link, and the one or more LEO space vehicles are configured to travel around the Earth in an orbit lower than GEO. ### Claim 19 (depends on 18) The system of claim 18, wherein the radio circuitry is further configured to enable the one or more LEO space vehicles to communicate with one another over a peer-to-peer network. ### Claim 20 (depends on 18) The system of claim 18, wherein the GEO ComSat comprises a MUOS ComSat of a MUOS GEO constellation, wherein the one or more ground control stations are configured to access the one or more LEO space vehicles via at least one of secret SIPRNET or NIRNET through standard IP access, and wherein the ground control stations are coupled to at least one MUOS GEO teleport via a MUOS interface facility and a session manager configured to perform MUOS GEO Sat node and beam handovers.