[amsat-bb] Re: HO-68 Status

Ng, Peter Peter.Ng at bccdc.ca
Fri Jan 14 09:09:55 PST 2011

Alan, many thanks to you and your team for maintaining this bird so the rest of us can play! ;)

73's Peter VE7NGP

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Alan Kung
Sent: Friday, January 14, 2011 8:42 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] HO-68 Status

In this week I received many reports from all over the world about faults of HO-68 
telemetry beacon. After we analyzed situation of the satellite, we think that 
the software of payload management MPU was not running properly, the communication 
of onboard data bus  between payload management MPU and the satellite management 
unit was stopped because of the software crashes. It led to the beacon problem 
and abnormal switch of transponder. 

Today we switched the satellite into safety mode at 0300Z , turn off most of onboard 
units, and then we re-powered up at 0440Z, the satellite was back to normal operating 
mode, so far the beacon operates normally. 

We will not upload command to the satellite for transponder operating skeds of next 
week, we will monitor continually in next week. Please send your report if you find 
any abnormal operation of HO-68.


Alan Kung, BA1DU
HO-68(XW-1) Project Manager

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