Partenaires

CNRS
RESIF
DT
UNAVCO Facility

Rechercher

sur ce site

sur web cnrs

Accueil > Documentation technique > Récepteurs > GB1000 receiver as a permanent station for nuts

GB1000 receiver as a permanent station for nuts

par Olivier Charade - 19 octobre 2015 - modifié le 26 octobre 2015

As INSU mobile pool of receivers replaced its GB1000 receivers by more recent receivers, GB1000 receivers are now used for initiating new permanent networks. Therefore It might be usefull to help operators with a basic setup which saves them from learning GRIL.

First step is to get a connection to the receiver, either through one of its serial ports (with an hyperterminal) or through its Ethernet port (Telnet on port 8002, login as session a,b, c, d or e, password accessible through the screen of the receiver _most of the time its serial number)

Then you have to speak in GRIL. Take care, there is no blank in a GRIL command !

init,/par/
init,/dev/nvm/a
init,/dev/blk/a
set,/par/cmd/create/prefix,SITE
set,/par/log/rot/sc/period,86400
set,/par/log/rot/sc/phase,0
set,/par/log/rot/sc/count,0
set,/par/log/sc/period,30
set,/par/button/auto,always
set,/par/opts/cind,on
set,/par/log/rot/mode,on

some explanations :

We begin with a general reset of the receiver for it has been usually used for something else before. First "init" is mandatory (back to factory parameters). The two others are safe (ephemerids, almanacs, etc. ; data).

Then we setup the name of the station (SITE must be replaced by the 4 characters code for your station). This is the prefix used for the names of the files created in the internal memory (external CF memory is unknown to the permanent station, see Acquisitions simultanées).

We tell it to issue daily files (86400 seconds long, beginning at midnight and in illimited number).

Sample period is 30 seconds.

After a power break down, the receiver must automatically wake up when the power is back.

Just for fun, Cinderella mode is activated. So our pumkin turns into a golden carriage every other Tuesday (all options are unlocked ; but it should already be the case on receivers acquired through UNAVCO).

Eventually we activate the Automatic File Rotation Mode (AFRM) so that the oldest file is erased when the memory is ful,l so that a new file can be created. This command will also initiate the recording of data.

All this set up should be possible interactively with pccdu (MinTerm) but pccdu only works on Windows.

Hoping it can help, I give the Perl programme I wrote for the EUREF permanent station in Patras (Greece) to download its data. The point with Perl is that it can simultaneously work with an object Telnet and an object ftp. So I can delete a file in the receiver once I have downloaded it. And if there is no data, the programme set up the receiver again. There is also PAT0 configuration file (that station issues hourly files with 1 second data). For people too shy to speak GRIL with the receiver even with the procedure here above, it is possible to put the parameters values in the configuration file. They have first to reset the receiver (easy with buttons) and then run the programme which will set up the receiver. My programme uses some Perl modules which are usually not in a basic Perl configuration. If you are not a Perl monk, ask for help.

Dans la même rubrique :