What data is sent from GPS satellites to receivers?
2017年8月9日 · Each satellite is sending exact (atomic) time, and GPS receiver calculates thanks to it, it's position. There is also some additional data, like position of satellite (almanac) which …
Why does GPS positioning require four satellites?
2012年11月13日 · 29. You need four satellites because each data from one satellite put you in a sphere around the satellite. By computing the intersections you can narrow the possibilities to …
Is GPS more accurate on specific hours of the day?
2017年8月9日 · NAVCOM GPS Satellite Predictor Tool. Great tool if you require a certain level of (x)DOP for GPS Data Collection, to prevent spending an entire day in the field due to poor …
Does the strength of GPS weaken in rural areas?
2013年11月19日 · To clarify: Unlike mobile phones (GPRS) who normally use ground based towers, the GPS signal comes from satellites orbiting the earth. So long as you can see the …
gps - Satellite data to position coordinates - Geographic …
2018年6月15日 · It goes on. But based on that info, I would say the time = 18:04:45.0811520511 UTC; latitude = 27° 1' N; longitude = 93° 49' W; and altitude = 20162.9 km. That site also has …
Determining GPS Position from Elevation, Azimuth, SNR
2016年12月5日 · This gentleman here can compute the location of a GPS satellite given receivers location, satellite elevation and azimuth. I want to merely do the reverse, given satellite …
android - Is there an industry-standard official mapping of Galileo ...
2015年9月23日 · In the U.S. GPS system, satellites are identified by the PRN number broadcast by each satellite. This ID is usually visible on most GPS receiver platforms that provide access …
gps - GLONASS Satellite Position Prediction using Almanac Data ...
There is a paper by Wang et al. called "Predicting GLONASS Satellite Orbit Based on an Almanac Conversion Algorithm for Controlled Ionosphere Scintillation Experiment Planning". In this …
satellite - Why is GPS a free service? - Geographic Information …
2014年12月12日 · 37. The Global Positioning System (GPS) is a free service that is owned and operated by the U.S. Government and is always available. When we buy a GPS device, we …
Seeking Public API to get GPS satellite's position?
2019年4月12日 · To solve this you've got to use a satellite future position predictor but the only API for that I've found only allows a projection of 300 seconds, so to make predictions up to …