The GIS Lens
Sanjay Gangal is the President of IBSystems, the parent company of AECCafe.com, MCADCafe, EDACafe.Com, GISCafe.Com, and ShareCG.Com.
Trimble® Floodlight™ Satellite Shadow Reduction Technology
August 31st, 2011 by Sanjay Gangal
Article source: Trimble
Satellite shadow is the number one problem for data collection teams needing high accuracy in difficult GNSS conditions. Trimble® Floodlight™ satellite shadow reduction technology is the solution— delivering dramatic improvements to accuracy and position availability when working in urban canyons and under tree canopy. This is a promotional video from Trimble about this technology:
WHAT IS SATELLITE SHADOW?
HOW DOES FLOODLIGHT TECHNOLOGY MITIGATE SATELLITE SHADOW?
Floodlight technology is compatible with real time and postprocessed workflows. There is no extra configuration, back-office processing, or quality control required—it just works.
WHY IS FLOODLIGHT TECHNOLOGY BETTER THAN OTHER TECHNIQUES TO IMPROVE POSITION AVAILABILITY?
Receivers that address satellite shadow by offering GPS and GLONASS positioning are only solving part of the problem.
Other solutions that use lower quality thresholds may increase position yield in obstructed conditions, but do so at the expense of accuracy. Floodlight technology tackles satellite shadow by improving satellite visibility and tracking while safeguarding against the effects of weak satellite signals on position quality— achieving the best possible position.