GeodSci 609: Surveying with Satellites

Winter Quarter 2006

Syllabus

Instructor: Dorota Brzezinska

224 Bolz Hall

tel. 292-8787

e-mail:

http://geodesy.eng.ohio-state.edu/course/gs609/

TA: Esteban Vazquez

226 Bolz Hall

e-mail: :

Class - Tuesdays and Thursdays, 9:30 – 10:18 am, BO 128

Lab - Friday 3:30 – 5:18 pm, BO 216

  1. Introduction to GPS: history, objectives, applications for 3D positioning; GPS reference system WGS84; basic principles of GPS operations: ranging from space; GPS constellation: its evolution and present state (Chap 1, 2, 3, 7:146-155, 10:279-284).
  2. Space, control and user segments; GPS orbit, fundamentals of orbital dynamics; precise vs predicted orbit; fundamental and derived frequencies, GPS time and clock characteristics; GPS satellite navigation message; GPS receiver: single vs. dual frequency receivers; navigation vs. geodetic quality; antenna types; primary equipment and software products (Chap 2, 4, 5, 9:203-204).
  3. Basic types of GPS observable: pseudoranges (P-code, C/A-code), L1 and L2 phases; pseudoranging with minimum constellation of four satellites; over-determined case; concept of dilution of precision (PDOP, HDOP, VDOP etc.); point positioning and differential mode; velocity determination with Doppler observable (Chap 6: 87-94, 8: 181-185, 9: 248-275 also needed in (4)).
  4. Differential processing of carrier phase measurements: single, double and triple differences; undifferenced mode; phase ambiguity and cycle slips (Chap 8: 186-202, 9: 205-235, 9: 248-275).
  5. Noise covariance models for carrier phase modes (Chap 8: 192-198).
  6. GPS error sources and error handling procedures: ionospheric and tropospheric effects, clock and orbital errors, multipath, anti-spoofing (AS) and selective availability (SA), inter-channel bias, antenna phase center drift, etc; interference and jamming; using dual frequency signal to eliminate ionospheric errors (Chap 6: 97-131).
  7. Special combinations: wide lane, narrow lane, ionospheric free and ion-only combinations.
  8. Static vs. kinematic GPS applications with phase measurements; cycles slips and ambiguity resolution on-the-fly (OTF); real time applications; differential services (7: 133-146, 9:213-235, 9: 275-278).
  9. GPS and height determination; attitude determination with GPS multiple antenna array (Chap 10: 290-292, 12: 326-330).
  10. GPS applications in surveying, mapping, GIS, air and land navigation and precision farming; integration with other sensors: inertial navigation systems (INS) and imaging sensors (Chap 12: 319-326, 12: 330-343, 13).

Grading:

Midterm 30%

Final 35%

Labs 35%

Textbook

  1. GPS: Theory and Practice, B. Hofmann-Wellenhof, H. Lichtenegger and J.Collins, 5th Revised Edition, Springer, Wien, New York, 2001.

References:

  1. Global Positioning System, Signals, Measurements and Performance, P. Misra and P. Enge, Ganga-Jamuna Press, 2001.
  2. GPS: Theory and Applications, B. Parkinson, J. Spilker, Jr. (Eds), Vol. I & II, AIAA, Washington, 1996.
  3. GPS Satellite Surveying, A. Leick, 2nd edition, John Wiley & Sons, 1995.
  4. GPS for Geodesy, A. Kleusberg and P. Teunnisen (Eds), Springer-Verlag, 1996.