On 3/27/19 11:49 AM, coderman via time-nuts wrote:
Compiled the software, but...
he user specifies the GPS satellite constellation through a GPS broadcast
ephemeris file. The daily GPS broadcast ephemeris file (brdc) is a merge of the
individual site navigation files into one. The archive for the daily file is:
ftp://cddis.gsfc.nasa.gov/gnss/data/daily/
There's a ton of files under that.. broken down by year/day of year/ and
then some subdirectories with dozens of files, that appear to be RINEX
(the names are things like
ftp://cddis.gsfc.nasa.gov/gnss/data/daily/2019/088/19f/USN700USA_R_20190880000_01D_CN.rnx.gz
A casual browse did not find the brdc.
Here's the toplevel readme - there's quite a few subdirectories in the
archive that are not listed in the readme. suffix letters, g,h,i,k,l, etc.
**********************************************************************
Welcome to the CDDIS GPS Archive
The main directories are:
/campaign GPS data from selected campaigns
/daily/YYYY/DDD/YYd Observation files for year YYYY and day DDD
(Hatanaka format)
/YYm Met files for year YYYY and day DDD
/YYn Navigation files for year YYYY and day DDD
/YYo Observation files for year YYYY and day DDD
/YYs Summary files for year YYYY and day DDD
(teqc output)
/hourly/YYYY/DDD/HH Hourly RINEX GPS files for year YYYY, day DDD,
and hour HH; observation (Hatanaka format),
navigation and met data
/high-rate/YYYY/DDD/YYd/HH Observation files for day YYDDD and hour HH
(Hatanaka format)
/YYm/HH Met files for day YYDDD and hour HH
/YYn/HH Navigation files for day YYDDD and hour HH
/satellite/SATNAME/YYYY/DDD GPS data from on-board GPS receivers for
satellite SATNAME for year YYYY and day DDD
/gps/products/ionex/YYYY/DDD Daily IONEX products for year YYYY and
day DDD
/trop/WWWW Weekly GPS troposphere products for GPS
week WWWW
/YYYY Yearly GPS troposphere products for year
YYYY
/nrt/WWWW Near real-time GPS troposphere products
for GPS week WWWW
/trop_cmp/YYYY/DDD Troposphere comparison results for year
YYYY and day DDD
/trop_new/YYYY/DDD New IGS troposphere product for year
YYYY and day DDD
/WWWW Weekly GPS precise orbits, etc. for GPS
week WWWW
All files are archived in UNIX compressed format.
Contact Carey Noll (carey.e.n...@nasa.gov) for further information.
**********************************************************************
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