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VHF Radio Call Sign:
WDE4414
Iridium phone cockpit:
00 - 88 1677 72 7018
Iridium spare 1:
00 - 88 1621 41 8079
Iridium spare 2:
00 - 88 1621 44 3804
Emergency Beacon:
ID: ADE90 05931 C34D
Handheld Emergency Beacon:
ID: LC 4652
Hovercraft registered in Delaware, US:
DL 1519 AB

Maintenance



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MINI-GUNCO


1.  SOFTWARE


1.1  Command line options


1.2  Normal mode


1.3  Debug (Verbose) mode


1.4  Raw data mode


The "raw data mode" is for debugging GPS serial input, and processing of these data.

GPS telegrams used in the program is extracted from the GPS data stream and dumped to screen. In addition, the telegram package forwarded for further processing is displayed, and also processing of each element of the package. By "telegram package" we mean all telegrams associated with a given second.

The system does not trigger the GUNCO in this mode.


System in raw data mode.

2.  HARDWARE


Mini-Gunco front panel. Click to see larger image.
Mini-Gunco front panel. Click to see larger image.

The Mini-GUNCO can be controlled through a computer serial port. COM port DTR & RTS lines are used to fire the airguns, according to this table:

   DTR -> GUN1 -> fire from 0 to 1 state
   RTS -> GUN2 -> ---"---

There is a wiring harness connection three units: PC, Mini-Gunco and GEODE. The aim is to fire airguns and trigger the seismic data collecting unit (GEODE) at the same time.

A loopback between RS-232 RX and TX inside the Mini-Gunco permits auto-decetion of Gunco presence on a specific COM port.

Refer to more detailed description here: http://www.geo.uib.no/eworkshop/GreenICE/#Instrumentation

2.1  Wiring harness between PC-serial_port / Gunco / Geode



Mini-Gunco wiring. Wiring harness and part of mini-Gunco internal wiring shown. (mini-gunco-wiring-24Oct2011.xls)

2.2  Modifications 2010


The Mini-Gunco was modified for 12/24 Vdc operation in May 2010.


Modifications 2010, click to see images.

2.3  Modifications 2011


  • RX-to-TX jumper in RS-232C connector, so that data sent (intended for Geode consumption) is also received by this loop-back, so we can detect presence of GUNCO on a specifig COM-port.
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Page last modified on October 24, 2011, at 02:39 PM
Department of Earth Science
University of Bergen
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