Re: Summary File And Difference File

From: Björn Gimle via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 1 May 2019 00:25:03 +0200
Charles,
Sorry for not answering sooner, but we've had a hectic day.
You have a couple of valid questions, one or two easily implemented
suggestions, and some solutions of your own..
It seems likely that I can answer more fully tomorrow - now it's past
midnight for us. Let me know what you are curious about !

Single-line-formatted text files can be sorted on several fields by many
utilities, including Windows SORT. I can add one or more fields, or produce
a few desired alternate lists, if other users don't object.
Multi-line records can be sorted with QSort411 on several fields over
multi-line records without intervening junk (or if so,  with a separator
token before each record).
UltraEdit can edit any type of file without destroying crucial "binary"
strings, sort single-line records on multiple fields, and like I do edit
multiline records into single-line.

With HeavenSat as prediction engine you practically don't need either - you
can filter predictions via a single maintained object list (can be replaced
by alternatives and a restart), or by eleven different quantities in the
Calculations menu including elset age, and the predictions can be be
produced sorted on eight different quantities, or edited and sorted
externally.
Once produced, all current prediction runs can be filtered on any partial
text string appearing in the recent prediction runs.

Let me know you worries !
--------------------------------------------------------
Björn Gimle, COSPAR 5919
59.2617 N, 18.6169 E, 51 m
Satellite observation formats described:
http://www.satobs.org/position/IODformat.html
---------------------------------------------------------


Den mån 29 apr. 2019 kl 19:38 skrev Charles Phillips <
charles_at_spaceflightresearch.net>:

> Bjorn -
>
> Those files looked useful; the difference file shows you which ones have
> not been tracked lately? It seems to give you a list to look down where you
> can see the old and new epoch times. Do you sort by epoch sometimes?
>
> I have just started tracking and the weather is now not going to be
> favorable for many months, if I can keep tracking I will sort the classfd
> file by epoch and discard the really old and really new ones - to see which
> could use some tracking. One view that is handy for me is sorted by
> inclination. I am currently mostly interested in higher inclination objects
> with low perigees (not that I have had any luck in tracking them!!). So far
> the only classfd sat that I have tracked is USA 281 (NROL 47) which seems
> to be well tracked. My only advantage is that my latitude in 29 degrees 36
> min North so I am closer to the Equator than some. A disadvantage is that
> my elevation is about 5 m above sea level and I am close to the Gulf of
> Mexico. And close to chemical plants that have many bright lights. :-(
>
> A question about your techniques - I had not seen UltraEdit before, that
> looks useful. You have some software that reads in the classfd file and
> outputs to text, so that UltraEdit can display it? UltraEdit can sort
> columns?
>
> I wrote my own code in C that reads in the classfd file and outputs it,
> then I sort columns, etc in Excel.
>
> Charles
> Houston, Texas
>
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Received on Tue Apr 30 2019 - 17:26:34 UTC

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