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For example, with
Reference Day
=33 (Feb 2), if the current
day is 30 (Jan 30), the station will start the first session
only in three days, whereas if the current day is 51 (Feb
20), the station will start the programmed sessions on that
day.
If you do not need to postpone the execution of the
sessions, keep the default value (1) for this option.
•
Offset per Day
(in minutes and seconds): This option is
specifically designed for users who wish to have the same
sky view of the GPS constellation every day. As the time
when the GPS constellation comes back to a given sky
view happens 4 minutes earlier every day, setting this
option to 04’00” will correct for this offset (i.e. this will
allow the same GPS sky view to be observed every day
through the same session).
With
Offset per Day
=4’00”, a session initially set to start at
9:00 for example will start at 8:56 on the second day, at
8:52 on the third day, etc. The same rule applies to the
session end time, and to all the other programmed
sessions.
If you do not need to offset the sessions, keep the default
value (0’00”) for this option.
Raw Data Types
and Files Collected
During Sessions
The type of raw data collected during sessions are all those
you have set on the
R port
. In addition, the amount of the raw
data collected is tied to the elevation of the satellites tracked
(
Recording Elevation Mask
).
Raw data are saved as
G-files
, using the same naming
convention as the one used in manual recording. A specific
Site Name
can be defined for files recorded through sessions.
The file naming convention used is recalled below:
G<SiteName><Index><Year>.<Day>
Example: GPT12C10.30 is the third G file generated on Jan 30, 2010 on a site
named PT12.
Storing G-Files
Collected During
Sessions
G-files are saved either in the receiver’s internal memory or
on a USB device, i.e. on the mass storage device connected
to the receiver via its USB port. With this last option used, a
really huge amount of memory can be associated with the
receiver. In both cases, G-files are all indistinctly saved in the
root directory of the selected storage device.
At this stage, special mention should be made of the
Ring File
Memory
. With this option activated, the reference station will
be able to collect data for an unlimited period of time without
external intervention. In practice, this option will allow the
