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 32

(6) Measures for deep space exploratory mission


In addition to above measures we may add a few other measures as follows, which may turn out to be effective with future Nozomi like deep space missions.


・Development of low bit rate comunication function for emergency cases

・Development of a system which is further improved on the system with new functions as follows used for the 20th scientific satellite (Hayabusa) for verification in deep space

Hayabusa was launched in 2003 as a deep space mission after Nozomi (18th scientific satellite). Hayabusa has following functions in addition to those available to Nozomi.


・Report packeting function

Function whereby results of autonomous actions are sent out each time by dedicated packets. If labour saving is wanted in operation then operation can be achieved only by report packeting.


・Choice of sampling rate at reproducing HK telemetry

Function whereby coarse transmission rate is used for coarse data scanning to be followed up later with only the required portion of data by higher sampling rate.

・System timer function

Function whereby commands are executed after a specified amount of time lapse, timing function for general purposes.

The measures intended for future as described by this current report as a result of Nozomi's failure are issues specific to all scientific satellites designed for deep space mission.

- 32 -

However, these are also issues commonly relating to space use devices and system development. Therefore, it is the wish of our organisation that these measures will be fully utilised for future space activities with increased reliability.

end of page 32

(I have not looked at the portion immediately after this, but I suspect that this might be the end of this report proper, only to be followed by supporting materials (appendices), which I will also translate, P)