Re: New Sat Cat

From: Marco Langbroek (
Date: Sat Feb 23 2013 - 13:23:15 UTC

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    Op 22-2-2013 1:36, Allen Thomson schreef:
    > I just checked it out and it seems to be not much more than a fancied-up
    > interface to the old functions -- that's a good thing in my opinion.  While I'm
    > slightly puzzled as to why they did it, it doesn't seem as if it will be much of
    > a problem for the sorts of searches/downloads I do. YMMV, of course.
    Indeed, all that could be done via the old website GUI can be done via the new 
    website GUI. Plus some more. For example, TIP-messages from several years back 
    can be shown (which the old site couldn't).
    It will need some time to get used to, but overall I am quite pleased with the 
    way this was done. Especially the fact that a humanly-workable GUI was 
    included/has been maintained. That was my biggest fear, and hence now my biggest 
    It is very clear that the site builders did listen well to our comments in the 
    beta phase, for which I wholeheartedly thank them! They built a very good, 
    usable website as a result.
    I especially like the easy way you can sort and restrict lists by typing in 
    restricting parameters in the boxes below tables, e.g. in the decay data.
    For example, after entering the decay data section from the main page, go to the 
    entry boxes at the BOTTOM of the list and type in "> 2012-11-01" under 
    'DECAY_EPOCH' and "TIP" under 'SOURCE', and the list will be restricted to 
    decays with actual TIP messages, in this case all of those with a decay epoch 
    later than 1 Nov 2012. Click the link in the SOURCE column to get the actual TIP 
    messages for that object.
    The only thing I haven't figured out yet is how to restrict that list to one 
    entry per object only (objects are now listed multiple times, for each new TIP 
    Using the "query builder" from the main menu you can retrieve custom lists. 
    Select under "class" what you want (e.g. the last TLE for an object, or TIP 
    messages), then select "order by" (e.g. NORAD number, or epoch) and whether the 
    list should be sorted in descending or ascending order under "sort". Under 
    "format", select the output format (for on-screen, select 'html'. For export to 
    a spreadsheet, select e.g. "csv"). Under "predicate" you can select a parameter 
    (e.g. "NORAD number") and set it to be restricted to a certain range, e.g. NORAD 
    numbers > 31000.
    Then click the green button "build query". A line will appear next to "API". Now 
    click on "API". In a new window, a list of data will appear according to the 
    parameters you set.
    The addition of a "0" to the name-line in 3-line format TLE's ("3le" format) is 
    slightly a nuisance but not very problematic.
    I wonder whether the option to retrieve full catalogues (it is still there!) is 
    only temporarily, or will stay. I hope it will stay.
    - Marco
    Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
    Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
    Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
    Station (b)log:
    Twitter: @Marco_Langbroek
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