| Date: | 2011-01-20 10:27:00 | |
| Sender: | Krzysztof Snopek <slrmail@dgfi.badw.de> | |
| Subject: | [SLR-Mail] No. 1951: Re: No.1943 : Transition to new ILRS data format | |
| Author: | Krzysztof Snopek | |
| Content: | ******************************************************************************** SLR Electronic Mail 2011-01-20 10:27:00 UTC Message No. 1951 ******************************************************************************** Author: Krzysztof Snopek Subject: Re: No.1943 : Transition to new ILRS data format Dear Carey, dear Randy, dear colleagues, here are some remarks on data in old and new format. I have analyzed SLR data I had collected from CDDIS and EDC for last several days. >From CDDIS I get data in old format from: ftp://cddis.gsfc.nasa.gov/pub/slr/data/npt/ and CRD from: ftp://cddis.gsfc.nasa.gov/pub/slr/data/npt_crd/ and from EDC: ftp://edc.dgfi.badw.de/pub/slr/data/npt/ ftp://edc.dgfi.badw.de/pub/slr/data/npt_crd/ Since 20110117 not all stations are present in both npt and crd files. For example for lageos1 for 20110117 in old format there are observations from: Altay, Yarragadee, Haleakala, Koganei, Tanegashim, Concepcion, Zimmerwald, Mount Stromlo, Simosato, Potsdam, Grasse, Wettzell and in crd files there are: Yarragadee, Haleakala, Koganei, Concepcion, Zimmerwald, Mount Stromlo, Simosato, Graz, Potsdam, Grasse, Wettzell Hence, in CRD are missing: Altay, Tanegashim, and in old format are missing: Graz Similar discrepancies are for other satellites. Concernig this, I have two questions: 1) Is this discrepancy because the conversion from one format to another is done with delay ? 2) Where the converted data are put ? On EDC I have found two directories: /pub/slr/data/npt_from_crd/ /pub/slr/data/crd_from_npt/ Will it be the same on CDDIS ? I thought that the directory structure of both DCs were the same ? Best regards Krzysztof On Wednesday 22 December 2010 09:41:16 you wrote: > *************************************************************************** > ***** SLR Electronic Mail Wed Dec 22 09:41:06 CET 2010 Message > No. 1943 > ************************************************************************** > ****** > > Author: Randy Ricklefs/ILRS CB > Subject: Transition to new ILRS data format > > To: Users of ILRS Data > > Dear Colleagues, > > As most of you know, the ILRS have been in the process of transitioning > from the old data formats, CSTG normal point and Merit II full rate, to > the new CRD (Consolidated laser Ranging Data) format over the last few > years. A formal validation process has been used to insure that the CRD > data sent from the stations matches or surpasses the quality of data in > the old format. Most of the SLR stations have now successfully passed > this validation process, and all the SLR analysis groups have or are > close to finishing their conversion. > > As has been announced earlier, the CRD format will be the operational > format for all ILRS data distribution as of January 15, 2011. At that > point, the following will happen. > > 1) All validated stations sending both CRD and old format data in > parallel should halt transmission of the old format; > > 2) All stations that have not been validated to send CRD data will > temporarily have their new data converted to the CRD format by the > Operations Centers (OCs). Stations are still expected to convert to the > new format as soon as possible, as the old format lacks many of the > useful capabilities of the new format. > > 3) CRD normal points will continue to be back-converted to the old > format and distributed in parallel with the CRD normal points for a > period of 2 months. This will serve as a grace period to allow other > data users to finish conversion. > > Please feel free to contact me with any questions on the conversion. > > Thank you to all the stations, operations centers, data centers, and > analysis centers for the long, hard work it took to make this conversion > a success. > > Best regards, > Randall Ricklefs > for the ILRS Data Formats and Procedures Working Group > and the ILRS Central Bureau -- Dr. Krzysztof Snopek Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences Department 1 Geodesy and Remote Sensing Section 1.2: Global Geomonitoring and Gravity Field c/o DLR Oberpfaffenhofen Muenchner Strasse 20 D-82234 Oberpfaffenhofen Tel: +49-8153-28-1196 Fax: +49-8153-28-1735 Email: snopek@gfz-potsdam.de From: slrmail@dgfi.badw.de From: Krzysztof Snopek ******************************************************************************** |