Satellite Data (in HDF format) now available from the ARM Archive
(11/14/1997)
Data derived from AVHRR, GOES, and GMS satellites are now available from the ARM Archive User Interface. Metadata have been added to the interface menus to allow for the selection of HDF files from the measurements, instruments, and data streams query options. Additional information on HDF data can be found at the following URLs:
- description of data streams (see sub-entries under Satellite Data): http://www.xdc.arm.gov/docs/data_info/
- inventory of files: http://www.xdc.arm.gov/stats/data_inventory/
- data viewers: http://www.xdc.arm.gov/data_viewers
Special considerations for requesting HDF data
- These HDF files are much larger than the typical ARM CDF files.
- Retrieval requests totaling more than 600 MB do not automatically start retrieval processing. Operator intervention is required to assure that disk space is available in the /armguest FTP area. Questions about the status of retrivals can be addressed to Archive User Services by e-mail to armarchive@ornl.gov or telephone 865-241-4851. FTP transfer of very large requests may be too slow. If preferred, please contact Archive User Services to have your request distributed on tape.
- Retrieval requests totaling more than 2 GB (2,000 MB) will cause a data base error (underneath the user interface) and the interface page that reports the number of files and sum of the size will truncate abnormally. At the bottom of the page you will see "...DB - Library attempted to bind to non-existent column." When this message is encountered, use the BACK button on your browser and reduce the number of days or data streams requested. Submitting smaller, multiple requests will not cause problems for the Archive retrieval process.
The following table provides information about the frequency and size of HDF files. This information can be used to help estimate the size of your request.
Typical size and frequency of ARM HDF files
| Data stream name | Description | Number of files per day | Typical file size (MB) |
| sgpavhrr10radX1.a1 | AVHRR radiance from NOAA-10 satellite | 1-2 | 1 |
| sgpavhrr10X1.a1 | Albedo and brightness temperatures from NOAA-10 satellite | 1-2 | 3.8 |
| sgpavhrr11radX1.a1 | AVHRR radiance from NOAA-11 satellite | 1-2 | 1 |
| spgavhrr11X1.a1 | Albedo and brightness temperatures from NOAA-11 satellite | 1-2 | 3.8 |
| sgpavhrr12radX1.a1 | AVHRR radiance from NOAA-12 satellite | 1-2 | 1 |
| spgavhrr12X1.a1 | Albedo and brightness temperatures from NOAA-12 satellite | 1-2 | 3.8 |
| sgpavhrr14radX1.a1 | AVHRR radiance from NOAA-14 satellite | 1-2 | 1 |
| sgpavhrr14X1.a1 | Albedo and brightness temperatures from NOAA-14 satellite | 1-2 | 3.8 |
| sgpavhrr9radX1.a1 | AVHRR radiance from NOAA-9 satellite | 1-2 | 1 |
| sgpavhrr9X1.a1 | Albedo and brightness temperatures from NOAA-9 satellite | 1-2 | 3.8 |
| sgpavhrrX1.b1 | AVHRR data, early ARM format (1994) | 1-2 | 11.5 |
| sgpgoes7ir8X1.a1 | GOES-7 infrared channel 8 | 48 | 3.1 |
| sgpgoes7irX1.a1 | GOES-7 infrared channels 7, 10, 12 | 48 | 3.6 |
| sgpgoes7rad8X1.a1 | GOES-7 radiance from channel 8 | 48 | 3.1 |
| sgpgoes7radX1.a1 | GOES-7 radiance from channels 7, 10, 12 | 48 | 3.6 |
| sgpgoes7visX1.a1 | GOES-7 visible channel | ~15-30 | 2.9 |
| sgpgoes8visX1.a1 | GOES-8 visible channel | ~10-25 | 3.1 |
| sgpgoes8X1.a1 | GOES-8 channels 1-5 | ~44-48 | 4.9 |
| sgpgoesirX1.b1 | GOES data, early ARM format (1994) | ~10-25 | 3.6 |
| sgpgoesvisX1.b1 | GOES visible channel, early ARM format (1994) | ~10-25 | 2.7 |
| twpgms5X1.a1 | GMS-5 5 km resolution | ~26-28 | 12 |
