Ultra rapid products
The Ultra rapid products are the results of offline analysis on the orbits and the clock of the GPS and QZSS satellites and the earth rotation parameter(ERP). The ultra rapid products are to be released approximately 5 hours later. Please note that the difference may increase during the events such as an attitude maneuvering. They are lists data below.
(1)Ultra rapid orbit
the orbits and the clock for each satellite at each given time. Consult the sp3c format for more information. In the products, "Time System" (Line13 Columns10-12) indicates "QZS", the time system that is identical to the GPST with a difference of a few nanoseconds. Besides please note that the navigation messages are compliant with GPST.
(2)Ultra rapid ERP
Information about earth rotation parameter. The data format is IGS ERP format(version 2)
「Latency」 approximately 5 hours
「Updates」 at 05:00, 11:00, 17:00, 23:00 (GPST)
- 「Sample Interval」orbit:15min
「File Name」 as described in the table below
|File Name (Ultra Rapid Products)|
|D||day of week (0-6)|
|HH||2-digit hour of day (00, 06, 12, 18)
orbit:24hours of observed data and 24hours of predicted data.
ERP:daily integrations at 00,06,12,18 GPST