1 GPS Observations and data-processing. Sat07_81.ppt, 2007-10-23. Observations: Pseudo-ranges from P-code obs. Pseudo-range differences from Doppler shift.

Slides:

Advertisements

Similar presentations

GPS Theory and applications

Advertisements

SVN-49 Signal Anomaly Presented by Tom Stansell GPSW POC: Lt. Col. James Lake, Ph.D.

Global Positioning System: what it is and how we use it for measuring the earth’s movement. April 21, 2011.

T GPS Fundamentals Your location is: 37 o ’ N 122 o ’ W.

2013 Western Australia Surveying Conference

University of Malta ICECS 2010 Terence Zarb, Ivan Grech, Edward Gatt, Owen Casha, Joseph Micallef Presented by: Terence Zarb Department of Microelectronics.

Earth Science Applications of Space Based Geodesy DES-7355 Tu-Th 9:40-11:05 Seminar Room in 3892 Central Ave. (Long building) Bob Smalley Office: 3892.

Jie Liu Microsoft Research Redmond, WA GPS Fundamentals Mobile Location Sensing Tutorial at MobiSys 2013.

A quick GPS Primer (assumed knowledge on the course!) Observables Error sources Analysis approaches Ambiguities If only it were this easy…

Global Navigation Satellite Systems

Astronomical Institute, University of Bern, Switzerland IGS Analysis Center Workshop June 2-6, 2008, Miami FL AIUB Astronomical Institute University of.

Geodetic Research Laboratory, Department of Geodesy and Geomatics Engineering Workshop, October 27 – 28, 2006, Quebec city, Quebec Sükeová, Liliána 1 L2C.

Communications - Access Schemes 1 Introduction to Space Systems and Spacecraft Design Space Systems Design.

1 GPS processing. Sat07_82.ppt, Directly from the observations 2.From differences (especially if vectors between points are to be determined)

GPS - Global Positioning System Presented By Brindha Narayanan.

1 TRANSIT. Sat05_72.ppt, Doppler-effect used: In the orbit Distant observer.

1 GPS processing. Sat05_82.ppt, Directly from the observations 2.From differences (especially if vectors between points are to be determined)

1 GPS Applications. Sat07_91.ppt, Static.

3/5/2004DSP Applied to GPS Algorithms1 of 14 DSP Applied to GPS Algorithms.

A SINGLE FREQUENCY GPS SOFTWARE RECEIVER

1 Observations. Sat05_71.ppt, Directions: satellite visible with stars as background. Direction to radio-source (VLBI) Directions and distances:

GPS – Global Positioning System Space segment Control segment user segment 32 satellites World wide monitor and control stations.

GPS and other GNSS signals GPS signals and receiver technology MM10 Darius Plausinaitis

1 Sat05_73.ppt, GPS Definition. Precise satellite navigation-system, which after 1993 will give users a 3-D position and velocity as well as.

Number of Epochs per Day 100% expected => many gaps in the data.

Phase Difference = Phase Difference = 0.05.

Communications - Access Schemes 1 Introduction to Space Systems and Spacecraft Design Space Systems Design.

TEC and its Uncertainty Ludger Scherliess Center for Atmospheric and Space Sciences Utah State University GEM Mini-Workshop San Francisco December 2014.

1 GPS Applications. Sat05_91.ppt, Static.

Principles of the Global Positioning System Lecture 14 Prof. Thomas Herring Room A;

How The GPS System Works. How the GPS System Works 24 satellites + spares 6 orbital planes 55° inclination Each satellite orbits twice every 24 hours.

Ruth Neilan and Jan Kouba IGS Central Bureau at JPL

Ground-Based Altimetry Using a Single- Receiver Single-Frequency GNSS Phase Ambiguity Resolution Technique G. Stienne* S. Reboul J.-B. Choquel M. Benjelloun.

Telecommunication 1.3 – Radio and Television. Radio and TV Receivers The parts of a radio and TV receiver can be represented by a block diagram. Write.

Modern Navigation Thomas Herring

1/28/2010PRRMEC What is GPS… The Global Positioning System (GPS) is a U.S. space- based global navigation satellite system. It provides reliable positioning,

for Maritime Services)

Earth Science Applications of Space Based Geodesy DES-7355 Tu-Th 9:40-11:05 Seminar Room in 3892 Central Ave. (Long building) Bob Smalley Office: 3892.

R/C Simulation and Hardware Proof of Concept Development Dr. Philip A. Dafesh, Dr. R. T. Bow, Mr. G. Fan and Mr. M. Partridge Communication Systems Subdivision.

Titelmaster Geometrical and Kinematical Precise Orbit Determination of GOCE Akbar Shabanloui Institute of Geodesy and Geoinformation, University of Bonn.

GPS: Global Positioning System  The Geographer’s best friend!  You can say with confidence… “I’m not lost!, I’m never lost!”* *Of course, where everybody.

How Does GPS Work ?. Objectives To Describe: The 3 components of the Global Positioning System How position is obtaining from a radio timing signal Obtaining.

SVY 207: Lecture 13 Ambiguity Resolution

Civil and Environmental Engineering and Geodetic Science This file can be found on the course web page:

Surveying with the Global Positioning System Phase Observable.

SVY 207: Lecture 7 Differential GPS By now you should understand: –How GPS point positioning works from first principles Aim of this lecture: –To understand.

Earth Science Applications of Space Based Geodesy DES-7355 Tu-Th 9:40-11:05 Seminar Room in 3892 Central Ave. (Long building) Bob Smalley Office: 3892.

Modulation - QPSK l Quadrature Phase Shift Keying is effectively two independent BPSK systems (I and Q), and therefore exhibits the same performance but.

Earth Science Applications of Space Based Geodesy DES-7355 Tu-Th 9:40-11:05 Seminar Room in 3892 Central Ave. (Long building) Bob Smalley Office: 3892.

Ali Al-Saihati ID# OUTLINE AWGN Channel. Rayleigh Fading Channel. Programs.

M. Gende, C. Brunini Universidad Nacional de La Plata, Argentina. Improving Single Frequency Positioning Using SIRGAS Ionospheric Products.

What Makes a GNSS Signal the IGS Analysis Center Workshop 2-6 June 2008, Miami Beach Larry Young (not an expert, just a user) Jet Propulsion Lab.

The Global Positioning System. Early Satellite Systems Satellite Surveying started more than 30 years ago. Now, High accuracy could be achieved in real.

Civil and Environmental Engineering and Geodetic Science Part IV TYPES OF GPS OBSERVABLE AND METHODS OF THEIR PROCESSING GS608.

1 SVY 207: Lecture 12 Modes of GPS Positioning Aim of this lecture: –To review and compare methods of static positioning, and introduce methods for kinematic.

Civil and Environmental Engineering and Geodetic Science This file can be found on the course web page:

Pseudoranges to Four Satellites

Civil and Environmental Engineering and Geodetic Science This file can be found on the course web page:

Using Real-time Networks in the Northeast

Principles of the Global Positioning System Lecture 08 Prof. Thomas Herring Room ;

SVY207: Lecture 10 Computation of Relative Position from Carrier Phase u Observation Equation u Linear dependence of observations u Baseline solution –Weighted.

1 SVY 207: Lecture 5 The Pseudorange Observable u Aim of this lecture: –To understand how a receiver extracts a pseudorange measurement from a GPS signal.

MODULATION AND MULTIPLEXING TECHNIQUES Each earth station will, in general, be transmitting and receiving many messages simultaneously to and from a satellite.

SVY207 Lecture 8: The Carrier Phase Observable

1 Glossary and GPS Case Studies. 2 Anywhere: The ability of a receiver to start position calculations without being given an approximate location and.

The Global Positioning System Rebecca C. Smyth April 17 - May 2, 2001.

AXK/JPL SBAS Training at Stanford University, October 27-30, 2003 Satellite Based Augmentation Systems Brazilian Ionosphere Group Training at Stanford.

Doppler Radar Basics Pulsed radar

Geodesy & Crustal Deformation

Presentation transcript:

1 GPS Observations and data-processing. Sat07_81.ppt, Observations: Pseudo-ranges from P-code obs. Pseudo-range differences from Doppler shift Carrier-wave phases or phase-differences Travel-time differences from interferometric measurements

2 GPSPhases. Sat07_81.ppt,

3 GPS Carrier (CR)-phases. Sat07_81.ppt,

4 GPS Code and Carrier Phases. Sat07_81.ppt, T is the satellite time t is the receiver (RCV) time t as subscript: transmitted signal r as subscript: received signal f CD = code-frequency f CR =carrier frequency Then Code: Φ CD (T t )=T tSV f CD Carrier: Φ CR (T t )=T tSV f CR

5 GPS Code and Phase. Sat07_81.ppt,

6 GPS. Sat07_81.ppt, n

7 GPS. Pseudo-range. Sat07_81.ppt,

8 GPS Phase. Sat07_81.ppt,

9 GPS Data differencing. Sat07_81.ppt, Using linear combinations, it is possible to eliminate various terms: Differences: between different stations satellites epochs However: noise increases ! Notation: i,j receivers (sub-scripts), p, q, satellites (super-scripts) t 1, t 2 epochs at position 1 and 2 of p. q. Pseudo ragnes: PR p 1i (example)

10 GPS Observations. Sat07_81.ppt,

11 Single differences, two receivers. Sat07_81.ppt,

12 Double-differences. Sat07_81.ppt,

13 Triple and other differences. Sat07_81.ppt,

14 GPS Linear combinations. Sat07_81.ppt,