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    Re: USNO Celnav data is back
    From: Frank Reed
    Date: 2022 May 4, 07:06 -0700

    Here's the entry form for the celestial navigation data page at the USNO site:
      https://aa.usno.navy.mil/data/celnav.
    Be aware that west longitudes must be entered as negative numbers.

    As expected, since the inputs to the interface from their minimalist new "API" are rounded to 0.001°, the output of altitudes to the tenth of a minute of arc are occasionally incorrect (but only by +/-0.1'). It's a minor inaccuracy but an interesting example of entropy taking a toll on a formerly reliable product.

    Frank Reed

       
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