JR Clynch Favorites
Here are just a few sites that I often visit. A list Format is followed by some discussion.
USEFUL and ENTERTAINING
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)
GPS
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
GEODESY
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
GEOPHYSICS
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
SOFTWARE
www.mathworks.com/matlabcentral/ Matlab software, includes users exchange below
www.mathworks.com/matlabcentral/link_exchange
sourceforge.net/ Good place for C/C++ sources
LINK LISTS
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.
www.navcen.usgc.gov
The GPS Joint
Program Office has official information that might be useful to some.
gps.losangeles.af.milThe 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
GEODESY
Links
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.
GEOPHYSICS Links
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 www.sec.noaa.gov/SWN/
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/