Power Draw Profile for a Trimble NetRS and Iridium System (polar)
Power Draw Profile for a Trimble NetRS and Iridium System
UNAVCO performed a benchtop test to record a high-resolution time history of power consumed by a Trimble NetRS GPS system with Iridium communications. The test system consisted of a Trimble NetRS receiver with Trimble Choke Ring antenna, NAL Research A3LA-I modem with SAF5350C antenna, Flexcharge NC30L12 solar regulator, and an ABB RS1A44 timer switch. This system represents the UNAVCO best-practices polar GPS station as of June 2006.
The test was performed at room temperature. A variable DC power supply was used to deliver 12.0 VDC to the battery input terminals on the power board, with current and voltage recorded at 10 Hz by a data acquisition computer running LabView. The data acquisition routine clipped the current burst signals above 1 amp (12 W) during Iridium data download, however this threshold was usually close to the true peak height of the ~0.1 second pulses. For longer duration, stronger bursts, a conservative visual estimation of the true peak height was made and used in calculating the power consumption during data download.
The measured power draw time series is presented in the figure below (right-click and select "View Image" for a larger view).
|Posted by: Beth Bartel - Sun, Mar 28, 2010 at 1:43 AM. This article has been viewed 4420 times.|
|Online URL: https://kb.unavco.org/kb/article/power-draw-profile-for-a-trimble-netrs-and-iridium-system-polar-510.html|