Search found 66 matches

by CDDIS_support_Lori
Wed Oct 14, 2020 4:10 pm America/New_York
Forum: Questions/Comments
Question: How can I access SLR data?
Replies: 1

Re: How can I access SLR data?

Satellite laser ranging (SLR) data are available through secure ftp and other methods. SLR data since 1976 are available online. Access the SLR data via the web at https://cddis.nasa.gov/archive/slr/data/ . Detalied information and examples for using other methods can be found on our Achive Access p...
by CDDIS_support_Lori
Tue Feb 25, 2020 11:34 am America/New_York
Forum: Questions/Comments
Question: IGS stations
Replies: 4

Re: IGS stations

Information on antenna files can be found at ftp://igs.org/pub/station/general/antenna_README.pdf
by CDDIS_support_Lori
Tue Feb 25, 2020 11:31 am America/New_York
Forum: Questions/Comments
Question: IGS stations
Replies: 4

Re: IGS stations

More detailed information about IGS stations including site guidelines and proposing a new station can be found at igs.org/network/information.
by CDDIS_support_Lori
Fri Feb 14, 2020 12:54 pm America/New_York
Forum: Questions/Comments
Question: BRDC navigation file
Replies: 1

Re: BRDC navigation file

The file https://cddis.gsfc.nasa.gov/archive/gnss/data/daily/ yyyy / ddd / yy n/brdc ddd 0. yy n.Z ( yyyy is the 4-digit year, ddd is the three-digit day of year and yy is the two-digit year) is the daily broadcast ephemeris file. This file is a merge of the individual site navigation files into one...
by CDDIS_support_Lori
Fri Feb 14, 2020 12:08 pm America/New_York
Forum: Questions/Comments
Question: IGS stations
Replies: 4

Re: IGS stations

The igs.org/network/list.html web page provides a list of current IGS sites and links to their site logs; a map is also available.
by CDDIS_support_Lori
Fri Feb 14, 2020 11:49 am America/New_York
Forum: Questions/Comments
Question: off-line CDDIS data
Replies: 1

Re: off-line CDDIS data

Access to GNSS data not accessible online can be requested by contacting the CDDIS manager using the "Contact Us" button at the bottom of any CDDIS website page.
by CDDIS_support_Lori
Fri Feb 14, 2020 11:38 am America/New_York
Forum: Questions/Comments
Question: Data archived at CDDIS
Replies: 1

Re: Data archived at CDDIS

Users can view CDDIS daily status files, found in the daily GLONASS data directories, which detail data availability for a particular day at:

https://cddis.nasa.gov/archive/glonass/data/daily/ YYYY/DDD where YYYY is the 4-digit year and DDD is the 3-digit day of the year.
by CDDIS_support_Lori
Fri Feb 14, 2020 11:21 am America/New_York
Forum: Questions/Comments
Question: Accuracy of GNSS products
Replies: 1

Re: Accuracy of GNSS products

The IGS Central Bureau maintains a table of accuracy information for the official IGS products. Additional information is available from a web page maintained by the Analysis Center Coordinator.
by CDDIS_support_Lori
Fri Feb 14, 2020 11:18 am America/New_York
Forum: Questions/Comments
Question: Products derived from GNSS data
Replies: 1

Re: Products derived from GNSS data

GNSS products are available through anonymous ftp and other methods. GNSS products (preceise ephemerides) since June 1992 are available online. Access the GNSS products by using one of the following methods: anonymous ftp at URL ftp://cddis.gsfc.nasa.gov/gnss/products/. NOTE this method will be disc...
by CDDIS_support_Lori
Fri Feb 14, 2020 11:11 am America/New_York
Forum: Questions/Comments
Question: Data products at CDDIS
Replies: 1

Re: Data products at CDDIS

Products derived from GNSS data and available from the CDDIS are provided by analysis centers supporting the International GNSS Service (IGS). IGS operational products include precise GNSS satellite ephemerides, positions and velocities of stations in the global GNSS network, EOPs (polar motion and ...