Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 23 Jun 1998 11:51:07 EDT |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Hi Karl,
Turns out the recent satellite failure is on a satellite in geosynchronous
orbit; a geo-orbit gives you one cycle/day making solder fatigue in a recent
satellite less likely. Very few commercial,if any, leo (low earth
orbit)-satellites are in space at this time; and you would not ear of failures
in military satellites. However, solder joint failures in the Hubble Telescope
and the Gallileo and Magellan spcecraft are documented; they occurred
primarily because of mandated inappropriate testing of the flight hardware
prior to launch which consumed about 60% of the mean solder joint lives.
Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL 32174 USA
Phone: 904-437-8747, Fax: 904-437-8737
E-mail: [log in to unmask]
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|