Past operations & data
Communications / Navigation / Tracking
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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.
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
Mini-Gunco wiring. Wiring harness and part of mini-Gunco internal wiring shown. (mini-gunco-wiring-24Oct2011.xls)
The Mini-Gunco was modified for 12/24 Vdc operation in May 2010.