NASA-LLIS-0274

Lessons Learned – Mars Observer Payload Data System (PDS) Exposure to Low Temperature

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T16:51:36Z
date available	2017-09-04T16:51:36Z
date copyright	07/09/1993
date issued	1993
identifier other	WQZCQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std/handle/yse/115203
description abstract	Abstract: During thermal vacuum testing of the flight Mars Observer PDS, the subsystem was exposed to a temperature of about -47 degrees Celsius, well below the desired limit of -20 degrees C. The problem was caused by a failure in a temperature controller and was compounded by a chamber operator evaluation error. The recommendations involve use of alarm and "fail safe" circuits, pretest functional verification of the test facility, procedures required before manual override of "fail safe" devices, and continuous quality assurance monitoring of tests.
language	English
title	NASA-LLIS-0274	num
title	Lessons Learned – Mars Observer Payload Data System (PDS) Exposure to Low Temperature	en
type	standard
page	3
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1993
contenttype	fulltext
subject keywords	Environment
subject keywords	Test & Verification