J2-ORBINFO - OSTM/Jason-2: Orbital Information

Dataset Name

GPSP1 JA2_GPSP1_yyyy_mm_dd_hh_nn_ss 
TWO_LINES JA2_TWO_LINES_yyyy_mm_dd_hh_nn_ss
MOE A2_POR_AXVCNEyyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss
POE JA2_VOR_AXVCNEyyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss

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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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Datatype

J2GPSP1
J2MOE
J2POE
J2TLE

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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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Satellite

The satellite that acquired the data.

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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.

The meaning of times varies within this data family. For GPSP1, the date/time means start time of first data point. Temporal search will be based upon that field. For the TLEs, it means create time, which will be the basis of a temporal search for that type. For the POEs and MOEs, the three times in the file name mean create, start of validity and end of validity. Temporal search will be upon the validity time range.

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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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