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This page last changed on May 26, 2010 by mccann.
How much data do we have?
Summary
Data Category
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CDM dataType
|
Period of observations |
Frequency of observations
|
Size on disk
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# of records
|
# of parameters
|
Size of record
|
| ROVCTD |
Trajectory |
1988 to 2010
|
15-second |
0.40 GB |
3 Million time records
|
16
|
130 bytes 4
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| Mooring 1 |
Station& StationProfile
|
1989 to 2010
|
10-minutes and hourly
|
1.03 GB
|
4.5 Million time records
|
20 |
80 to 4800 bytes 2 |
| AUVCTD |
Trajectory |
2003 to 2009 (269 surveys)
|
2-second gridded
|
0.45 GB
|
5.6 Million time records
|
10 |
80 bytes 3 |
| UCTD |
Trajectory |
|
|
|
|
|
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| PCTD |
Profile |
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|
|
|
|
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| BCTD |
Profile |
1988 to 2010
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Nominally fortnightly
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Bottom line: We have just about 2 GB, certainly less than 10 GB. What we are dealing with can fit on a modern laptop.
Notes:
- See Mooring Data Details table below
- Record size for mooring data depends on number of profile depths in the record, up to 60 levels for ADCP data
- Double precision (8-bytes) used for AUVCTD NetCDF data
Mooring Data Details - from THREDDS Data Server (TDS) aggregation of QC'ed data from the netCDF data archive
Notes:
- Flag variables in the netCDF files are not counted
- Foreign keys in the database tables are not counted
- A Date Range is show if Ferret is able to show it (many of these data sets exceed Ferret's 750,000 record limit on irregular axis data)
- Single precision (4-byte) floating point values for variable storage
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