Nozomi in perspective, Revisiting the causes of failure Options

[pandaneko]

http://www.mext.go.jp/b_menu/shingi/uchuu/...ts/04061101.pdf

Above pdf file will be translated for aspiring students in aeronautics, control engineering etc. so that in future lay people like me will be able to enjoy planetary scenes and events without worrying about failures.

The overall title is "Looking into the causes of failure and trying to find the right measures to take for the future with respect to the 18th scientific satellite (PLANET-B ) not inserted into Mars orbit as planned" and it is dated 21 May 2004.

This file is very much detailed at 1.1 megabytes and the number of pages is about 40, I think. In addition, I will be translating 3 more files after this particular file. They will be;

1. ISAS file with views and comments on the failure
2. Another ISAS file, a newsletter written out in a series of 4 individual letters.
3. JAXA file, which is a press release and it is a very concise document with just sufficient details.

Re concise link making I tried a few times, but I simply failed and all the links will be fully pasted out as required.

Pandaneko

[pandaneko]

http://www.mext.go.jp/b_menu/shingi/uchuu/...ts/04061101.pdf

above for ease of reference

page 42

fig. II-1-2 Status at the time of failure in December 1999 (time is UTC)

(Here, most of the time line is in English. I simply suppllement those with captions in Japanese)

07:17 Start of attitude change (sun angle 60 degrees)

07:33 attitude control completed (sun angle 120 degrees)

07:41 SPIN-Up (->25 RPM) time taken is 1 minute

08:06:20 to 08:13:04 OME fired

08:32 SPIN-Down (->10 RPM) time taken is 1 minute

08:40 Start of attitude change (sun angle 120 degrees)

09:00 Attitude control completed (sun angle 43 degrees)

(character string inside this large box says):

all monitored values and status were normal except that the monitored value of NTO upstream pressure started declining as the firing started. (confirmed by reproduced TLM)

(the 1st red arrow pointing at 12:00 says): News flash from JPL that there was an insufficiency (shortfall of delta V) of about 100 m/s against the planned value of 423.22 m/s

(2nd red arrow just past 14:00 says): similar insufficiency confirmed by onboard TLM integration

end of page 42

P