[IGSMAIL-6443] IGS Final Troposphere product transition to USNO

[Sharyl Byram]

Author: Sharyl Byram, USNO

Dear IGS Colleagues:

We are pleased to announce that the USNO has officially made the 
transition to providing the IGS Final Troposphere products as of July 
2011. Files for the final troposphere estimates will continue to be 
located at ftp://cddis.gsfc.nasa.gov/gps/products/troposphere/zpd with 
consistent file naming and formatting.

The Final Troposphere products are produced using a PPP method and GMF 
mapping functions with the Bernese software. The expected latency is 3 
weeks dependent on the availability of the IGS Final orbits, clock, etc. 
Our hopes is that this will be a seamless transition from the products 
produced by JPL, the previous IGS Final Troposphere product provider.

Any questions or issues should be directed to the project manager, 
Sharyl Byram (sharyl.byram @ usno.navy.mil), or Christine Hackman 
(christine.hackman @ usno.navy.mil).

Thank you
Sharyl Byram

-- 
Sharyl Byram, PhD
Astronomer, GPS Analysis Division
Earth Orientation Department
United States Naval Observatory
3450 Massachusetts Avenue NW
Washington, DC 20392
tel: (202) 762-0185
fax: (202) 762-1563
sharyl.byram at usno.navy.mil