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Dataset Name
The naming conventions for the files in this family are as follows:
HKTM-R Packets |
JA2_HKTMR_P_yyyy_mm_dd_hh_nn_ss
or
JA2_HKTMR_P_yyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss |
HKTM-R Frames |
JA2_HKTMR_F_yyyy_mm_dd_hh_nn_ss
or
JA2_HKTMR_F_yyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss |
PLTM-1 Packets |
JA2_PLTM1_P_yyyy_mm_dd_hh_nn_ss
or
JA2_PLTM1_P_yyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss |
PLTM-1 Frames |
JA2_PLTM1_F_yyyy_mm_dd_hh_nn_ss
or
JA2_PLTM1_F_yyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss |
PLTM-2 Packets |
JA2_PLTM2_P_yyyy_mm_dd_hh_nn_ss
or
JA2_PLTM2_P_yyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss |
PLTM-2 Frames |
JA2_PLTM2_F_yyyy_mm_dd_hh_nn_ss
or
JA2_PLTM2_F_yyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss |
Fields in caps are fixed and those in lower case are as follows:
yyyy = 4-digit year (e.g. 2008).
mm = 2-digit month (01-12).
dd = 2-digit day of month (01-31).
hh = 2-digit UTC hour of the day (00-23).
nn = 2-digit UTC minute of the hour (00-59).
ss = 2-digit UTC second of the minute (00-59).
For file naming conventions using the date/time format yyyy_mm_dd_hh_nn_ss, the specified date/time is the creation date/time.
For file naming conventions using the date/time format yyyymmdd_hhnnss_yyyymmdd_hhnnss_yyyymmdd_hhnnss, the first date/time is the creation date/time, the second date/time is the start date/time, and the third date/time is the end date/time.
Filename examples:
JA2_HKTMR_P_2008_06_20_09_37_50
JA2_PLTM2_F_20110926_222419_20110926_204417_20110926_221901
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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
J2HKTMR |
Jason-2 Recorded Housekeeping Telemetry Packets |
J2HKTMRF |
Jason-2 Recorded Housekeeping Telemetry Frames |
J2PLTM1 |
Jason-2 Payload Core-Mission Science Telemetry Packets |
J2PLTM1F |
Jason-2 Payload Core-Mission Science Telemetry Frames |
J2PLTM2 |
Jason-2 Payload Passenger Mission Science Telemetry Packets |
J2PLTM2F |
Jason-2 Payload Passenger Mission Science Telemetry Frames |
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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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Telemetry APID
The telemetry application process identifier for a Counsultative Committee for Space Data Systems (CCSDS) telemetry packet. It identifies the on-board instruments that acts as the data source.
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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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