NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: USNO Celnav data is back
From: Frank Reed
Date: 2022 May 4, 07:06 -0700
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
