Subject: Marine Geospatial Ecology Tools (MGET) help
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| From: | "Jason Roberts" <> |
|---|---|
| To: | "'Steven G. Wilson'" <> |
| Cc: | <> |
| Subject: | RE: [mget-help] SSH File Nomenclature |
| Date: | Thu, 25 Aug 2011 14:39:48 -0400 |
Hi Steve,
Yes, the last three numeric digits refer to the day of the year, where 001
is January 1 and 365 is December 31 during non-leap years and December 30
during leap years.
The file name is constructed using fragments of the AVISO metadata. "dt_ref"
means that it is a "Delayed Time Reference" data product. "merged" means
that it merges data from multiple satellites. "msla" stands for Mean Sea
Level Anomalies. "h" means that it is SSH.
Aviso is not 100% clear about what the date stands for. My reading of their
documentation is that the file does not represent a 7 day average. Instead,
it represents the instantaneous state of the ocean at the given date. I
recall reading that they utilize something like 35 days of data to build
each file, including data both before and after the date of the file. To
learn more:
http://www.aviso.oceanobs.com/fileadmin/documents/data/tools/hdbk_duacs.pdf
Best,
Jason
-----Original Message-----
From: Steven G. Wilson
[mailto:]
Sent: Thursday, August 25, 2011 1:55 PM
To:
Subject: [mget-help] SSH File Nomenclature
Hi,
I downloaded some SSH data using the MGET tool and would like some
information on the file nomenclature. They appear to be 7-day SSH
anomaly maps. Here's an example:
dt_ref_merged_msla_h_2010146.img
I assume the numbers at the end refer to the year and "day of the
year number"? Is that correct? And does the "day of the year number"
refer to the first day of the 7-day period, or the last day?
Thanks for any help.
Steve
Dr. Steven G. Wilson
Hopkins Marine Station of Stanford University
120 Oceanview Blvd
Pacific Grove, CA 93950
Tel: 831-655-6225
Cell: 619-884-7893
Yes, the last three numeric digits refer to the day of the year, where 001
is January 1 and 365 is December 31 during non-leap years and December 30
during leap years.
The file name is constructed using fragments of the AVISO metadata. "dt_ref"
means that it is a "Delayed Time Reference" data product. "merged" means
that it merges data from multiple satellites. "msla" stands for Mean Sea
Level Anomalies. "h" means that it is SSH.
Aviso is not 100% clear about what the date stands for. My reading of their
documentation is that the file does not represent a 7 day average. Instead,
it represents the instantaneous state of the ocean at the given date. I
recall reading that they utilize something like 35 days of data to build
each file, including data both before and after the date of the file. To
learn more:
http://www.aviso.oceanobs.com/fileadmin/documents/data/tools/hdbk_duacs.pdf
Best,
Jason
-----Original Message-----
From: Steven G. Wilson
[mailto:]
Sent: Thursday, August 25, 2011 1:55 PM
To:
Subject: [mget-help] SSH File Nomenclature
Hi,
I downloaded some SSH data using the MGET tool and would like some
information on the file nomenclature. They appear to be 7-day SSH
anomaly maps. Here's an example:
dt_ref_merged_msla_h_2010146.img
I assume the numbers at the end refer to the year and "day of the
year number"? Is that correct? And does the "day of the year number"
refer to the first day of the 7-day period, or the last day?
Thanks for any help.
Steve
Dr. Steven G. Wilson
Hopkins Marine Station of Stanford University
120 Oceanview Blvd
Pacific Grove, CA 93950
Tel: 831-655-6225
Cell: 619-884-7893
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