{MUST SEE} 1st version of GPS !

[Inggo]

Here is the first GPS, has 270 pounds! (about 122,5 kg)!!
may not fit in your winshield, but this is can replace your dashboard ..

GDM gps.jpg

GDM military GPS
Date manufactured: 1977

Item History: The Generalized Development Model (GDM) was the first military Global Positioning System (GPS) five-channel receiver developed by Rockwell Collins (then the Collins Government Avionics Division of Rockwell International). It weighed more than 270 pounds and was contained in the Air Force equipment flight test pallet and behind the seating and air conditioning pallet.
The basic resources of the system included a high-performance antenna assembly (HPAA), four RF channels connected to five single channel processors (SCP) via an 8x5 switch, a receiver processor, a data processor, an inertial assembly, a control/display assembly, an interface assembly and a bus controller. The test pallet also contained the instrumentation subsystem and power control and conditioning equipment.

History: The Generalized Development Model (GDM) program as sponsored by the Air Force Avionics Laboratory (AFAL) and was one of several user equipment programs intended to validate the feasibility and operational utility of GPS. Rockwell Collins (then the Collins Government Avionics Division of Rockwell International) designed and built the GDM system under contract to the AFAL. The primary objective of the concept validation phase (phase 1) of the GPS development program was to establish the performance limits of GPS user equipment under high dynamic conditions in an electromagnetically hostile environment. In addition, the GDM was intended to be a flexible test bed capable of emulating and evaluating a variety of alternate user equipment configurations throughout the concept validation phase of GPS. The GDM served to evaluate high anti-jam system techniques for military applications and to expand the technology base for GPS user equipment.

cheers..

[Inggo]

This is Rockwell Collins' GPS for anyone who always moving..
very convenient for Backpakers
maybe you can try this..

very good use in your car or your truck
suitable for office even in extreme conditions..
here is ... GPS for WAR
You've not only can launch navigation program but also can launch the missile.. !

manpack.jpg

manpack backview.jpg

manpack GPS on soldier.jpg

Model number: AN/PSN-8

Date manufactured: 1980

Item History: The Manpack was the first man-portable Global Positioning System (GPS) receiver. It was developed by Rockwell Collins (then the Collins Government Avionics Division of Rockwell International) as part of the GPS phase 2 preproduction contract and deployed during the GPS phase 3 initial production equipment contract. It is a one-channel set that weighs about 17 lbs. and was designed to be carried on a rucksack frame, backpack style. However, due to its weight, it was most often strapped to a truck or helicopter. Since it was a single channel GPS receiver, it was not able to track multiple GPS satellites simultaneously. To form the GPS position solution, the Manpack sequentially acquired and tracked four GPS satellites. A cryptographic code could be loaded into the set, thereby giving it the capability to provide Precise Positioning Service (PPS). Adaptations of the Manpack were used in early GPS missile integrations including Conventional Air Launched Cruise Missile (CALCM) and Standoff Land Attack Missile (SLAM).