[jamsat-bb:11704] Re: [jamsat-bb:11700] Re: パソコンの時計修正について

["Yoshio Esaki" <esaki01@attglobal.net>]

IDEFIXのテレメトリー解読ソフトの作者　F1HDD　Ghislain氏から、
テレメトリーの受信にあたっては、PCの時計を精確に合わせてほしい
とのメールがJI1IZR　眞田さんと私宛に来ました。　それによると、
IDEFIXに搭載時計の精度は必ずしも良くないため、受信側の時刻との
比較でズレを検知する目的もあるようです。

また、テレメトリーのフレームごとにタイムスタンプを入れるように改良
した新しいバージョンの解読ソフトが従来と同じWebサイトから入手でき
るとのことです。

詳しくは原文を添付しますので参照ください。

73,

de JA6BX 江崎

---------- 以下　F1HDD　のメール原文　------------

Dear om,
the home tile indicated in the frames is made to have a correct time
stamping of the frames and subframes.
The internal clock of the IDEFIX is not very accurate and it is
therefore mandatory to include the PC time in order to get the exact
drift of the internal clocks. As there is only a single time stamp
transmitted, not every subframes are time stamped. In the case you get
only a subframe, there is no other mean than the local PC time to
accurately date the data. hence the necessity to have a precise time
adjust of the clock of the PC.

A new version of the demod software is distributed today and it adds a
PC time at every subframe. It is available on the website.

Any way, here at MASAT-France, we warmly tank the japanese OM for their
contribution.

CU2 has still one week ahead of energy and we really need data.
CU1 has still at least 2 weeks ahead of transmitting.
The lifettime is heavily dependent on battery time.

The attitude of the third stage is still evolving slowly and the
temperature is raising again and the antennas should be better oriented
to get better signals.
As i do not have access to jamsat-bb, please could you disseminate and
redistribute the info ?

Thank you very much and best 73

Ghislain
F1HDD/ON1RG



-------------
JAMSAT BB Mailing List
http://www.jamsat.or.jp/infoserv/mlist.html