Satellite Coordination Calculation & Software

Presentation / Satellite Coordination Calculation & Software

Date Submitted: 04 October 2001

Written by RPC Telecommunications. Website:

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A lecture covering satellite coordination calculation. Both the software, and manual sides of calculation are covered.

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-Section 1
Coordination Tasks
-Section 2
Link & Interference Analysis
-Section 3
Protection Ratio Analysis
-Section 4
Databases, Data Gathering and Processing
-Section 5
ITU Software Tools
-Section 6
Proprietary Software Tools
-Section 7
Protection Ratio Analysis
Protection ratio is the minimum acceptable single entry C/I for a wanted carrier. 

This is defined by ITU-R Recommendations. Recommendation ITU-R S.741 summarises the protection ratios for different wanted carrier types. Protection ratios are generally defined in terms of an "allowable" interference level as a proportion of the thermal noise in a link.

Examples for different wanted carrier types:

Digital carrier

  • 6% of thermal noise
  • PR = C/N + 12.2 dB

FM/TV carrier

  • 4% of thermal noise
  • PR = C/N + 14 dB

FDM/FM (multiplexed telephony) carrier

  • 800 pW0p in 7500 pW0p noise budget, i.e. 10.67% of thermal noise
  • PR = C/N + 9.7 dB

Next: Section 4 - Databases, Data Gathering and Processing


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