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JR Clynch Favorites

Here are just a few sites that I often visit.  A list Format is followed by some discussion.


en.wikipedia.org/wiki/Main_Page                     Open Encycopedia (Wiki)
epod.usra.edu                                                  Earth Picture of the Day (EPOD)
antwrp.gsfc.nasa.gov/apod/astropix.html            Astronomy Picture of the Day (APOD)


 www.navcen.usgc.gov                                                          US Coast Guard Navigation Center
gps.losangeles.af.mil                                                            GPS Joint Program Office
tycho.usno.navy.mil                                                             US Naval Observatory - Time etc.
www.colorado.edu/geography/gcraft/notes/gps/gps_f.html    GPS section Geographer's Craft
International GNSS Service                                                  International Data Archive at JPL
maia.usno.navy.mil/                                                              International Earth Rotation - data/information


www.colorado.edu/geography/gcraft/contents.html             Geographer's Craft - Huge Tutorial
earth-info.nga.mil/GandG                                                  NGA (military mapping site) Publications
www.ngs.noaa.gov                                                                              National Geodetic Survey, Data etc.
     ngs geodesy links


www.spaceweather.com/                                      Space Weather - Aurora, explainations
www.sec.noaa.gov/SWN                                       Space Weather Now
National Geophysical Data Center (NGDC)         Tutorials, data
 www.ngdc.noaa.gov/seg/geomag/                         Earth's Magnetic Field, data, tutorials


www.mathworks.com/matlabcentral/                    Matlab software, includes users exchange below
sourceforge.net/                                                    Good place for C/C++ sources


www.spatial.maine.edu/~leick/alpha.htm              Alfred Leick's list, GPS and Geodesy
gge.unb.ca/HotList.html                                      U. New Brunswick geodesy
www.mpt.geo.uu.se                                              Swedish U. Uppsala, Earth Sciences List
U. New South Wales Geospatial Lab.                   Satellite Navigation and Positioning Lab.

For information on a topic you can, of course "Goggle" it.  But a more useful approach is to use Wiki, the new open encyclopedia.       en.wikipedia.org/wiki/Main_Page

If you want to look at the best pictures of the outdoors, especially of unusual items,  try the Earth Picture of The Day (EPOD)  at 
epod.usra.edu  .  This site has a short explanation of the picture, and phenomena, with links to more information.

A similar site for astronomy (which really came first) is the Astronomy Picture of the Day (APOD) at 
antwrp.gsfc.nasa.gov/apod/astropix.html.    The explanations here are exceptionally good, as well as the links.  And the pictures, from telescopes and often space probes, are "out of this world"

For both EPOD and APOD a link at the bottom takes you to the "Archives".

GPS Links

The main official place to get information is the US Coast Guard Navigation Center.  It is also a very useful site with current status information, official specifications, and some basic background information.  Information on the future plans for the GPS system are often presented at the official GPS Interagency Working Group meetings. Their minutes, often with full presentations, are located at the uscg navcenter site.    

The GPS Joint Program Office has official information that might be useful to some.

The US Naval Observatory is the official time keeper for GPS.  Their site has a GPS subsection (see link on left) with both official information and tutorials.  This is also a very interesting site in the other main sections.

The excellent instruction site, the Geographer's Craft (see below) ,  has a section on GPS


One of the best sites to get a good introduction and overview into Geodesy is the "Geographer's Craft".  This site is now at U. Colorado.   www.colorado.edu/geography/gcraft/contents.html

The National Geospatial Agency, has a publications site on Gravity and Geophysics.  It has a lot of publications from the introductory to the dry specification.  The site is occasionally off line, but can usually be found at: earth-info.nga.mil/GandG  .   Go to the bottom of the left side list for the Publications.

If you need data, such as the latest earth model, or coordinates of a specific bench mark, or all bench marks in your area, or...   go to the National Geodetic Survey site at:  www.ngs.noaa.gov  .   They also have some software available as well as online processing options for some survey  data.


Here I am giving links to the geophysics of the upper atmosphere, the ionosphere, the space environment near earth.

A site on the current "geomagnetic/solar"  conditions run by NOAA is at:  
www.spaceweather.com/  .    There are a lot of good links at the bottom.

One is to the Space Environment Weather Center's  "Space Weather Now" site  
although for "magnet storms" the main site has better graphics  On both of these SEC sites, there is a "Education/Outreach"  link on the left that leads to many tutorials.

Some Tutorials are on the
National Geophysical Data Center (NGDC)  sites. There are many links to data on these sites.  For the earth's magnetic field try  www.ngdc.noaa.gov/seg/geomag/

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