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The PNT service is derived
from non-dedicated PNT
services leveraging existing
GNSS infrastructure
Cislunar space is defined from Earth’s
Geosynchronous region to encapsulate the Moon’s
orbit and its Lagrange points
LOS GPS
Signals
Status Report
PoP: December 2023 - January 2024
4 DISTRIBUTION STATEMENT B: Distribution authorized to U.S. Government Agencies Only: Proprietary Information Oct. 6, 2023 DFARS SBIR/STTR data rights-DFARS 252.227-7018.
• GNSS Link Budget, SOO Signal Performance, and PNT
Performance Models (Group 4)
• Develop GPS Transmit Antenna MATLAB Models using Existing
GPS Antenna Models for Cislunar E2E MATLAB Simulator
Geometry for reception of GPS signals in high Earth orbits
Mean global offsets per block used to normalize the final reconstructed antenna patterns. Note: Block IIA SVS 33, 35, and 39
are not included in this list because they were taken out of the constellation before enough data could be recorded
Geometry of the GPS transmitter yaw model for Block IIA and IIF (a) and Block IIR and IIR-M (b).
(a) (b)
Adjust the gain
for Block IIR,
IIR-M, and IIF
Status Report
PoP: December 2023 - January 2024
5 DISTRIBUTION STATEMENT B: Distribution authorized to U.S. Government Agencies Only: Proprietary Information Oct. 6, 2023 DFARS SBIR/STTR data rights-DFARS 252.227-7018.
• GNSS Link Budget, SOO Signal Performance, and PNT
Performance Models (Group 4) (Cont’d)
• Develop GPS TX power MATLAB Models using Existing
GPS transmitting power
URL link for a list of GPS SV name, Block number, and orbital slot:
https://en.wikipedia.org/wiki/List_of_GPS_satellites#Orbital_slots_(by_SVN)
GPS TX Power Specifications
Measured EIRP for GPS Block IIF satellite G065
Measured EIRP for GPS Block III satellite G074
• No EIRP measurements are available for the GPS Block I and Block II
satellites. Therefore, the measured mean value of the Block IIA satellites
with 50W is assumed for both blocks
• As no transmit antenna gain pattern is available for GPS III, no transmit
power could be estimated. Therefore, a total power of 300W is assumed
based on Block IIF transmit power
EIRP(dB) = TX Power(dB) + Antenna Gain(dB) – Cable Loss (dB)
Status Report
PoP: December 2023 - January 2024
6 DISTRIBUTION STATEMENT B: Distribution authorized to U.S. Government Agencies Only: Proprietary Information Oct. 6, 2023 DFARS SBIR/STTR data rights-DFARS 252.227-7018.
• GNSS Link Budget, SOO Signal Performance, and PNT
Performance Models (Group 4) (Cont’d)
• Develop GPS TX power MATLAB Models using Existing
GPS transmitting power
URL link for a list of GPS SV name, Block number, and orbital slot:
https://en.wikipedia.org/wiki/List_of_GPS_satellites#Orbital_slots_(by_SVN)
GPS TX Power Specifications
Measured EIRP for GPS Block IIF satellite G065
Measured EIRP for GPS Block III satellite G074
• No EIRP measurements are available for the GPS Block I and Block II
satellites. Therefore, the measured mean value of the Block IIA satellites
with 50W is assumed for both blocks
• As no transmit antenna gain pattern is available for GPS III, no transmit
power could be estimated. Therefore, a total power of 300W is assumed
based on Block IIF transmit power
EIRP(dB) = TX Power(dB) + Antenna Gain(dB) – Cable Loss (dB)
Status Report