NNSS satellite receivers

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Article #16212

#16212

From: Gijs Fehmers
Date: Fri, 22 Jan 1993 09:46

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Hello,
Here are some questions about the antique NNSS (Navy Navigational
Satellite System), or Transit, receiving equipment.

I am a Ph.D. student working on an ionospheric-geodetic project.
I am working with NNSS (Navy Navigational Satellite System) receivers
that cause some problems. The equipment consists of 8 geodetic NNSS 
(2 CMA-751 and 6 CMA-761) receivers, all built by the Canadian 
Marconi Company.

I am facing problems loading programs in the CPU's of the receivers.
The software is stored on digital cassette tapes which were recorded 
about 10 years ago. The information has faded and reading the tapes 
causes checksum errors.

Can anyone help me with the following questions:
1 How to obtain the programs CMA-751.000.X, 751.004.X, 761.201.X, and
  761.210.X (X is wildcard), in any code?
2 Can you give me some information on the IM6100 CPU that is built 
  in the receivers (compiler, manufacturer etc) ?
You would help me greatly,

Gijs Fehmers,   e-mail: tnnigf@urc.tue.nl
Technical University of Eindhoven, Department of Applied Physics
P.O. Box 513,  NL-5600 MB  Eindhoven,  the Netherlands

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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sun4nl!tuegate.tue.nl!rw8.urc.tue.nl!tnnigf
From: tnnigf@rw8.urc.tue.nl (Gijs Fehmers)
Newsgroups: sci.electronics
Subject: NNSS satellite receivers
Message-ID: <tnnigf.727695986@rw8.urc.tue.nl>
Date: 22 Jan 93 09:46:26 GMT
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