Search found 55 matches

by CDDIS_support_Lori
Tue Nov 17, 2020 2:26 pm America/New_York
Forum: Questions/Comments
Question: MGEX navigation files (brdmDDD0.YYp.Z)
Replies: 1

Re: MGEX navigation files (brdmDDD0.YYp.Z)

After 21-Jun-2020, the provider of these files stopped uploading them regularly to the CDDIS because the short name MGEX files are being phased out. The files are still available in long name format (BRDM00DLR_S_YYYYDDD0000_01D_MN.rnx.gz) under https://cddis.nasa.gov/archive/gnss/data/campaign/mgex/...
by CDDIS_support_Lori
Thu Nov 12, 2020 1:27 pm America/New_York
Forum: Questions/Comments
Question: Data Download and File reading
Replies: 2

Re: Data Download and File reading

Hello, I am not sure whether you want daily or hourly data, but we have information on broadcast ephemeris data at: https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/broadcast_ephemeris_data.html That page includes information on how the files are named and where they can be found in the archive...
by CDDIS_support_Lori
Tue Nov 10, 2020 9:49 am America/New_York
Forum: Questions/Comments
Question: GNSS navigation ephemeris
Replies: 1

Re: GNSS navigation ephemeris

Registering with Earthdata Login is only required for HTTPS access. If you want to use ftp-ssl with a tool like FileZilla you will need to enter in the following: Host: gdc.cddis.eosdis.nasa.gov Port: 21 (or leave blank for the default) User: Anonymous Password: <<Your EMAIL ADDRESS>>
by CDDIS_support_Lori
Tue Oct 20, 2020 11:30 am America/New_York
Forum: Questions/Comments
Question: Perl script to download hourly GNSS data
Replies: 1

Re: Perl script to download hourly GNSS data

To change from using ftp to ftp-ssl in a Perl script, you will need to change more than just the URL. You will need to use a different library such as Net::FTPSSL. You can also make the calls via HTTPS using something such as Net::HTTPS or use another library like Net::Curl. No matter which way you ...
by CDDIS_support_Lori
Wed Oct 14, 2020 4:39 pm America/New_York
Forum: Questions/Comments
Question: Precise Orbit Determination products?
Replies: 1

Re: Precise Orbit Determination products?

IGS analysis centers provide satellite orbit solutions to the CDDIS using pre-determined schedules, e.g., sub-daily, daily, or weekly, depending upon the data product. The IGS analysis center coordinator retrieves these solutions and produces a combined product, which is then in turn archived at the...
by CDDIS_support_Lori
Wed Oct 14, 2020 4:32 pm America/New_York
Forum: Questions/Comments
Question: Precise Orbit Determination products?
Replies: 1

Precise Orbit Determination products?

Where can I get Precise Orbit Determination (POD) products?
by CDDIS_support_Lori
Wed Oct 14, 2020 4:25 pm America/New_York
Forum: Questions/Comments
Question: How can I access VLBI data?
Replies: 1

Re: How can I access VLBI data?

VLBI data are available through secure ftp and other methods. VLBI databases since 1979 are available online. Access the VLBI data via the web: https://cddis.nasa.gov/archive/vlbi/ivsdata/.

Detalied information and examples for using these methods can be found on our Achive Access page.
by CDDIS_support_Lori
Wed Oct 14, 2020 4:23 pm America/New_York
Forum: Questions/Comments
Question: How can I access VLBI data?
Replies: 1

How can I access VLBI data?

How can I access VLBI data at the CDDIS?
by CDDIS_support_Lori
Wed Oct 14, 2020 4:22 pm America/New_York
Forum: Questions/Comments
Question: How are SLR data stored at the CDDIS?
Replies: 1

Re: How are SLR data stored at the CDDIS?

SLR data are available in subdirectories by data type, satellite, and year. The data type supported by the ILRS is on-site normal points, found in directories at https:// cddis.nasa.gov/slr/data/npt_crd.
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...