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Satellite communications subsystem in-orbit verification system and methodologies

A satellite and signal technology, applied in the field of satellite systems, can solve the problems of expensive components and resources, and achieve the effect of easy discovery and precise pointing

Active Publication Date: 2018-11-23
TELSAT CANADA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Components and resources associated with satellites are very expensive

Method used

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  • Satellite communications subsystem in-orbit verification system and methodologies
  • Satellite communications subsystem in-orbit verification system and methodologies
  • Satellite communications subsystem in-orbit verification system and methodologies

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Embodiment Construction

[0058] As briefly explained above, there are many challenges that may affect the planning and execution of traditional payload IOTs. The increasing complexity of the design and capabilities of onboard communication payloads is coupled with the need to coordinate where and when payload IOT can occur so that RF (and in some cases, physical interference to neighboring satellites) is minimized. These challenges are exacerbated by the combination of imposed constraints. When combined with the highly specialized requirements for using IOT-capable ground facilities, this will continue to increase the effort and cost associated with planning and conducting traditional payload IOT activities. Listed below are examples of some of the challenges associated with planning and conducting payload IOT activities. Included in each example are the benefits that the systems and methods invented by IOV can provide:

[0059] 1. Specialized RF ground facilities

[0060]The highly specialized RF ...

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Abstract

The present invention relates to satellite systems and more particularly, to the provision of novel systems and methods for verifying the in-orbit performance and operation of satellite communicationssubsystems. In contrast to traditional Payload IOT (in-orbit test), the invention operates without an uplink signal, by generating hardware-specific signatures using isolated, internally generated, thermal noise. It has been found that this noise provides a very stable, repeatable signal for testing. Prior to launch, a repeater command sequence is executed to generate a hardware-specific signature based on the internally-generated noise. The same repealer command sequence is then executed in-orbit to determine whether the hardware-specific signature has changed. The two signatures may be recorded and compared using a simple tool such as a spectrum analyzer. The methods also include novel use of the sun as a test signal source to calibrate equipment, to quantify atmospheric effects and tobe used as an intermediate reference power level during measurements.

Description

technical field [0001] The present invention relates to satellite systems, and more particularly, to providing novel systems and methods for demonstrating the on-orbit performance, functionality, and operation of satellite communication subsystems. Background technique [0002] After a newly launched satellite has reached its operational orbital altitude, a series of comprehensive tests must be performed to confirm that all components of the communications subsystem have survived the rigors of launch and that initial on-orbit performance meets design specifications. The regime of these tests is often referred to as payload in-orbit testing or simply Payload IOT. The traditional start of a lifetime payload IOT includes a series of dedicated and specific RF measurements. After successful completion of the payload IOT campaign, which includes detailed manual comparison of measured RF parameters with pre-launch predictions to ensure performance is met, the satellite is accepted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/40H04B7/185
CPCH04B7/18515H04B17/21H04B17/40H04B7/18519H04B7/1858H04B7/18597H04B17/12
Inventor S.里德R.伊普
Owner TELSAT CANADA
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