N: 36.2 S: 35.8 E: -125 W: -125.2
Description
This dataset provides the in-situ measurements from a Pressure-sensing Inverted Echo Sounder (PIES) deployed by the SWOT prelaunch field campaign. The campaign was designed to test the performance of several instruments/platforms in meeting the SWOT Calibration/Validation (CalVal) requirement. It was conducted near the SWOT CalVal crossover location, about 300 kilometers west of Monterey, California between September, 2019 and January, 2020. The campaign also deployed three CTD moorings, a slocum glider, and another bottom pressure recorder. The PIES measurements include bottom pressure and the round-trip travel time from the IES, which can be used to derive equivalent steric height through regression. Details can be found in the user guide and the journal reference given in the documentation section.
Product Summary
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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Documents
DATA CITATION GUIDELINES
GENERAL DOCUMENTATION
Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor | Offset |
|---|---|---|---|---|---|---|---|
| ACOUSTIC_TRAVEL_TIME | See separate QC flags to identify good/bad data points. | s | double | -9.9 | 0 to 10 | 1 | N/A |
| ACOUSTIC_TRAVEL_TIME_QC | This quality control flag describes the data that link here through the ancillary_variables attribute. | N/A | byte | N/A | 0 to 8 | 1 | N/A |
| DEPTH | Depth estimated from average pressure data, with standard atmospheric pressure subtracted. | m | double | -9.9 | 0 to 12000 | 1 | N/A |
| LATITUDE | LATITUDE | degrees_north | double | -99.9 | -90 to 90 | 1 | N/A |
| LONGITUDE | LONGITUDE | degrees_east | double | -999.9 | -180 to 180 | 1 | N/A |
| SEAFLOOR_PRESSURE | Atmospheric pressure and tides are still included in these data. See separate QC flags to identify good/bad data points. See bounds in time variable to understand what periods the data are averaged over. | dbar | double | -9.9 | 0 to 12000 | 1 | N/A |
| SEAFLOOR_PRESSURE_QC | This quality control flag describes the data that link here through the ancillary_variables attribute. | N/A | byte | N/A | 0 to 8 | 1 | N/A |
| TIMEP | Data represent averages over the periods listed in the 'bounds' variable. A linear clock drift has been subtracted, based on the following: True time was 06-Sep-2019 00:00:00 at instrument time 06-Sep-2019 00:00:00. True time was 05-Feb-2020 20:43:30 at instrument time 05-Feb-2020 20:43:14. | days since 19500101T000000Z | double | -9.9 | 0 to 90000 | 1 | N/A |
| TIMEP_BOUNDS | TIMEP_BOUNDS | N/A | double | -9.9 | N/A | 1 | N/A |
| TIMET | A linear clock drift has been subtracted, based on the following: True time was 06-Sep-2019 00:00:00 at instrument time 06-Sep-2019 00:00:00. True time was 05-Feb-2020 20:43:30 at instrument time 05-Feb-2020 20:43:14. | days since 19500101T000000Z | double | -9.9 | 0 to 90000 | 1 | N/A |