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Data Usage Guidance/Restrictions
Access restrictions on the Operational Geophysical Data Records were lifted on 15 December, 2008. Restrictions on the Interim Geophysical Data Records were lifted on 15 January, 2009. Restrictions on the Geophysical Data Records will be lifted after the June 2009 Ocean Surface Topography Science Team meeting, which serves as the final Jason-2/OSTM product verification workshop.
All members of the Ancillary data family (J2-ANC), Orbital Information family (J2-ORBINFO), and Quality Assurance reports family (J2-QA) were made unrestricted on 15 December, 2008.
Filetypes in the Auxiliary data family (J2-AUX), which are produced by the European Centre for Medium-Range Weather Forecasts (ECMWF), are restricted by ECMWF to the Jason-2 project team. All telemetry data (J2-TEL) are restricted to the project team, per the mission's 4-partner Memorandum of Understanding. For these restricted data families, users will only see listed those datatypes upon which they can search.
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Dataset Name
nrtavs_yyyymmdd_000000.pdf
nrtavs stands for Near Real-Time Altimetry Validation System;
yyyymmdd indicates the year, month and day of the 10-day period covered by the report;
and 000000 indicates that the timestamp of the report is 0 hours UTC.
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Datatype
NRTAVS - Near Real-Time Altimetry Validation System
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End Time
The UTC date and time corresponding to the end of the coverage of the given dataset.
Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.
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Inventory ID
A unique numerical ID assigned to the data set for CLASS inventory purposes.
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Start Time
The UTC date and time corresponding to the beginning of the coverage of the given dataset.
Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.
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Temporal
Refers to the time span of interest to the user. This section of the search page allows the user to define
the range of dates/times of interest.
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UTC
Coordinated Universal Time (UTC) is the international time standard. It is the current term for what was referred to as Greenwich Meridian Time (GMT). Zero (0) hours UTC is midnight in Greenwich England, which lies on the zero longitudinal meridian. Universal time is based on a 24 hour clock, therefore, afternoon hours such as 4 pm UTC are expressed as 16:00 UTC (sixteen hours, zero minutes).
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