The Explanatory Supplement To The Astronomical Almanac Pdf -

The Explanatory Supplement to the Astronomical Almanac is available in PDF format from various sources, including:

The "interesting paper" you are likely looking for is Explanatory Supplement to the Astronomical Almanac, Third Edition by Sean E. Urban and P. Kenneth Seidelmann. Harvard University Explanatory Supplement the explanatory supplement to the astronomical almanac pdf