-Original Message-
From: Doug [mailto:dmck...@gte.net]
Sent: Friday, March 31, 2000 11:26 AM
To: EMC-PSTC Discussion Group
Subject: Re: Mars Lander EMC problem?
Lacey,Scott wrote:
Barry,
Insufficient testing. They have been able to duplicate the problem in the
lab, using another Mars Lander
Maybe all of the naysayers have been right all along and EMC/EMI is really
black magic.
-Original Message-
From: Doug [mailto:dmck...@gte.net]
Sent: Friday, March 31, 2000 11:26 AM
To: EMC-PSTC Discussion Group
Subject: Re: Mars Lander EMC problem?
Lacey,Scott wrote:
Barry
Lacey,Scott wrote:
Barry,
Insufficient testing. They have been able to duplicate the problem in the
lab, using another Mars Lander. The problem occurs some percentage of the
time. Other times it does not.
Scott
Maybe it's just a loose wire thingie ... grin
-pstc%ieee@interlock.lexmark.com
cc:(bcc: Oscar Overton/Lex/Lexmark)
Subject: RE: Mars Lander EMC problem?
Lou,
IMHO, the poor management problem does not only belong to NASA, also to the
senate committee. The committee should help NASA improve their Verification and
Qualification
: Thursday, March 30, 2000 7:05 PM
To: Lacey,Scott; Tony J. O'Hara
Cc: emc-p...@majordomo.ieee.org
Subject:RE: Mars Lander EMC problem?
Scott and Tony,
That means the sensor was unable to tell the leg jolt from the
landing shock
Lou,
IMHO, the poor management problem does not only belong to NASA, also to the
senate committee. The committee should help NASA improve their Verification and
Qualification procedure.
Not long ago NASA had a failed mission due to a design mistake omitting
transition unit for propelling
Sen. McCain is on the committee that oversees NASA. He recently said that
the basic problem is poor management. IMHOP he's right.
lou
At 02:41 PM 3/30/2000 -0500, you wrote:
Tony,
I don't think it was actually EMC. The report I saw on CNN said the legs
opened with a jolt, fooling the sensors
Tony,
I don't think it was actually EMC. The report I saw on CNN said the legs
opened with a jolt, fooling the sensors which were supposed to cut the
retro rockets when they detected the shock of landing.
Scott Lacey
It looks like Scott Lacey is right, thank you! I made the assumption that
Hmm - I think we need some on-site research done on this one..
-Original Message-
From: Tony J. O'Hara [mailto:tonyoh...@compuserve.com]
Sent: Thursday, March 30, 2000 10:31 AM
To: IEEE list server
Subject: Re: Mars Lander EMC problem?
Hi
I thought many people would be interested
Hi
I thought many people would be interested in this as it looks like the
recent NASA Mars Lander loss was due to EMI/EMC problems!
I have just extracted a small piece of the e-mail report I got! Contact me
directly if anyone wants the entire e-mail.
From Peggy Wilhide
Headquarters, Washington,
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