- Mon Nov 10, 2008 4:49 am
#58685
Hi,
I would like to add a GPS to my IMU to create an INS. The problem is that I need the GPS measurements relatively accurate for short period of time.
I have searched many webs but I have not found answers to my specific questions. They are:
When I get measured data from the GPS, there is some noise/error. What is a character of that error for a short term (say minutes), in outdoors conditions, several Hertz sampling rate. Is it a pure white noise around a mean (position) or does it have another character (say slow moving of the mean, stairs, sawteeth ...).
How accurate are the measurements? But I am not interested in exact global poistion. Lets say that I have measured some position in the beginning of measurement. How would the measured position change in several minutes.
And what about verical accuracy? It should be worse than horizontal.
What chip is the best for me?
This above are my basic questions. If anyone knows write please or send a link to some pages where I could find answers to this sort of questions.
thanks for help
I would like to add a GPS to my IMU to create an INS. The problem is that I need the GPS measurements relatively accurate for short period of time.
I have searched many webs but I have not found answers to my specific questions. They are:
When I get measured data from the GPS, there is some noise/error. What is a character of that error for a short term (say minutes), in outdoors conditions, several Hertz sampling rate. Is it a pure white noise around a mean (position) or does it have another character (say slow moving of the mean, stairs, sawteeth ...).
How accurate are the measurements? But I am not interested in exact global poistion. Lets say that I have measured some position in the beginning of measurement. How would the measured position change in several minutes.
And what about verical accuracy? It should be worse than horizontal.
What chip is the best for me?
This above are my basic questions. If anyone knows write please or send a link to some pages where I could find answers to this sort of questions.
thanks for help