Vemco HR2, Руководство пользователя

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CLOCK_SET
CLOCK_SET records contain information about receiver clock set events. A clock set event is
generated when the receiver’s clock is set using an external source such as your computer (ex: at
initialization). CLOCK_SET records are used in conjunction with CLOCK_REF records to calculate
drift-corrected times (“Time” field) for the data in all record types.
Field Description
Device Time (UTC) UTC date and time of the data according to the receiver’s clock (the
uncorrected time).
Time Date and time of the data following correction for receiver clock drift
(the corrected time). The time offset of this time from UTC is indicated
in the “Time Offset (h)” column.
Time Offset (h) Offset from UTC time, in hours, of the value in the “Time” column.
The time offset is as selected when the receiver log was exported to
Fathom CSV format using the Fathom software.
Time Correction (s) The difference between uncorrected (“Device Time (UTC)”) and cor-
rected (“Time”) times.
Model Receiver model that generated the data in this record.
Serial Number Serial number of the receiver that generated the data in this record.
Prior Device Time
(UTC)
UTC date and time according to the receiver’s clock before the clock
was set using the external source
Prior Difference (s) Difference between the external date and time (ex: UTC time cal-
culated from your computer’s time and time zone settings) and the date
and time according to the receiver’s clock (“Prior Device Time
(UTC)”), immediately prior to setting the receiver’s clock
Source Source of the external date and time information
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HR2 Receiver User Guide