msinger said:So, how do we figure out if it's GLONASS enabled?CapnBob said:By itself, indicating 12-13 satellites doesn't necessarily mean it's GLONASS enabled.
wildpalms said:Something else I haven't seen mentioned in relation to GPS is the augmenation systems to improve accuracy. I got my facts wrong on GLONASS so this is probably redundant as well. In the US you have WAAS to improve accuracy and here in the EU we have EGNOS. This is meant to improve accuracy of the positioning but again is poor in urban environments. Unlike GPS these are geostationary.
CapnBob said:wildpalms said:The problem with WAAS is, it's a ground-based system.
+1CapnBob said:Roger, I am not confused. WAAS is indeed a "Wide Area Augmentation System ". However, It is a GROUND BASED system. As LORAN was. Multipath was then and is now an issue. I believe you are confused. RADIO and MICROWAVE are the same thing, Different frequencies. As is visible light, and infrared, and ultraviolet.. It's all electromagnetic radiation.
CapnBob said:I found the spec sheet on the NEO-7:
http://www.u-blox.com/images/downloads/ ... 003%29.pdf
And this is for the NEO-6 series:
http://www.u-blox.com/images/downloads/ ... 003%29.pdf
Notice the last bullet under "Highlights"
•Backward compatible with NEO-6 and NEO-5 families
Looking into this..
CapnBob said:Roger, I am not confused. WAAS is indeed a "Wide Area Augmentation System ". However, It is a GROUND BASED system. As LORAN was. Multipath was then and is now an issue. I believe you are confused. RADIO and MICROWAVE are the same thing, Different frequencies. As is visible light, and infrared, and ultraviolet.. It's all electromagnetic radiation.
CapnBob said:See previous post. I was confusing WAAS with a project I worked on years ago. I stand corrected.
I hate getting old.
WAAS uses a network of ground-based reference stations, in North America and Hawaii, to measure small variations in the GPS satellites' signals in the western hemisphere. Measurements from the reference stations are routed to master stations, which queue the received Deviation Correction (DC) and send the correction messages to geostationary WAAS satellites in a timely manner (every 5 seconds or better). Those satellites broadcast the correction messages back to Earth, where WAAS-enabled GPS receivers use the corrections while computing their positions to improve accuracy.
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