Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
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Special Notice Regarding LORAN Closure: *** In accordance with the 2010 DHS Appropriations Act, the U.S. Coast Guard terminated the transmission of all U.S. LORAN-C signals on 08 Feb 2010. This termination does not affect U.S. participation in the Russian American or Canadian LORAN-C chains. U.S. participation in these chains will continue temporarily in accordance with international agreements. You may read more and download pertinent documents via
our LORAN-C page.
GPS
ALMANACS, NANUS, AND OPS ADVISORIES (INLUDING ARCHIVES)
Almanac information is available for download from this page.
You may very well need to change the health settings when
you use Yuma or SEM almanac data. While the orbital description
data is generally usable for months, the satellite health
may change at any time. For information on satellite health
at times other than the almanac "Time Of Applicability",
see the NANUs or status messages. An almanac entry of 000
indicates the satellite is healthy.
