Due: November 25, 2003

Given:

• 120 epochs of PIN2 data
• Navigation/Clock file
• Matlab code from the entire semester
• 120 epochs of differential corrections The format is :
  • time since midnite in minutes
  • east - meters
  • north - meters
  • vertical - meters
  • number of satellites in solution

Warning:

These are real data. There are unfortunately zero values in the RINEX file for the P1 and/or P2 data. You can trap these bad values by only using satellite data that are between 16,000 and 30,000 km. Use P1 and P2 to form P3, not C1 and P2.

Directions

• Calculate updated station coordinates for your RINEX file, but instead of computing lat/long/ht, translate deltaX, deltaY, deltaZ into East, North, and Vertical. Use the transformation matrix on my website.
• Do use a troposphere model, with a wet zenith delay of 5 cm .
• You do not have to iterate on your nominal coordinates. The values in the RINEX header are good enough for what you need.
• Make a plot of east, north, vertical as a function of time (minutes since midnite).
• Pick up my differential east, north, vertical corrections and plot your values minus my values as a function of time.
• What is the RMS values for each of your components? Also compute the RMS values for the differences.
• Can you explain why sometimes your coordinates disagree with mine?

Turn in: plots, software and answers to questions.