Hmm - I think we need some on-site research done on this one..
-----Original Message-----
From: Tony J. O'Hara [mailto:[email protected]]
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 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, DC March 28, 2000
(Phone: 202/358-1898)
MARS PROGRAM ASSESSMENT REPORT OUTLINES ROUTE TO SUCCESS
An in-depth review of NASA's Mars exploration program, released today,
found significant flaws in formulation and
execution led to the failures of recent missions, and provides
recommendations for future exploration of Mars.
The Mars Program Independent Assessment Team (MPIAT) started work on
January 7, 2000, and delivered its final report to the Agency in mid-March.
The report concluded the most probable cause of the failure was the
generation of spurious signals when the
lander legs were deployed during descent. The spurious signals gave a
false indication that the spacecraft had
landed, resulting in a premature shutdown of the engines and the
destruction of the lander when it crashed on Mars.
Without any entry, descent and landing telemetry data, there is no way
to know whether the lander reached the
terminal descent propulsion phase. If it did reach this phase, it is
almost certain that premature engine shutdown
occurred, the report concluded.
In addition, today, Dr. Edward Weiler, the Associate Administrator for
Space Science, announced the cancellation
of the planned Mars 2001 lander awaiting his approval of a new overall Mars
"architecture" plan. >>
Tony
Colorado
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Jim Bacher: [email protected]
Michael Garretson: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Jim Bacher: [email protected]
Michael Garretson: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
