RECALL THE THEORETICAL JARGON:

Slides:



Advertisements
Similar presentations
Principles of the Global Positioning System Lecture 05 Prof. Thomas Herring Room A;
Advertisements

Real Time IGS Pilot Project (RT-PP) Status Report IGS Workshop Newcastle UK, June 28, 2010 Ken MacLeod and Mark Caissy.
DV Module 3 Benefits. Overview State Specific Module 3 Components Step Numbers Functions Documents Rules Definitions Comments.
Utility programs and scripts Thomas Herring
Where do precise orbits and clocks come from? Kristine M. Larson ASEN 6090 Spring 2010.
Army Geospatial Center
Well, “Translate, Edit, and Quality Check” of what?
GPS Theory and applications
Modern Navigation Thomas Herring MW 11:00-12:30 Room A
GPS Signal Structure Sources: –GPS Satellite Surveying, Leick –Kristine Larson Lecture Notes 4519/asen4519.html.
Introduction to RINEX, GPS Raw Data
ADA Compliant Websites & Documents What the heck am I supposed to do?
GPS measurements in the field M. Floyd K. Palamartchouk Massachusetts Institute of Technology Newcastle University GAMIT-GLOBK course University of Bristol,
GPS data from receiver to processing input
Tokyo University of Marine Science and Technology T. Takasu, T. Ebinuma and A. Yasuda 2009 International Symposium on GPS/GNSS Effect of Quasi Zenith Satellite.
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.
Solar Disturbance of GPS Satellite Orbits Merita Halili Orhan Veliu 06 june 2008.
1 HTML Markup language – coded text is converted into formatted text by a web browser. Big chart on pg. 16—39. Tags usually come in pairs like – data Some.
23-Jun-15 HTML. 2 Web pages are HTML HTML stands for HyperText Markup Language Web pages are plain text files, written in HTML Browsers display web pages.
Number of Epochs per Day 100% expected => many gaps in the data.
Carey E. Noll CDDIS Manager NASA GSFC USA IGS Data Centers and Data Access.
Modern Navigation Thomas Herring MW 11:00-12:30 Room
Angelyn Moore IGS Central Bureau Jet Propulsion Laboratory USA The IGS Network.
OPUS Projects (beta) status and plans Improved solutions for simultaneous or repeated observations harvest data from multiple observers share upload &
L2C: Civilian code on L2 carrier broadcast by 7 Block IIR-M SV’s since 2005, and 1 Block IIF since  Unencrypted code – tracked by civilian receivers.
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.
Introduction QZSS (Quasi-Zenith Satellite System) program:
Amber Annett David Bell October 13 th, What will happen What is this business about personal web pages? Designated location of your own web page.
The Nav Bar. Nav is short for Navigation. Having a Navigation Bar makes searching for information easier on those accessing your page. Here are some common.
Mr.Samniang Suttara B.Eng. (Civil), M.Eng. (Survey) Topcon Instruments (Thailand) Co.,Ltd. Tel Satellite Surveying.
Modern Navigation Thomas Herring MW 11:00-12:30 Room A
Class 19 – NAVSTAR GPS, GLONASS and Galileo
OPUS : Online Positioning User Service
Tools to help complete “Height Mod” Surveys OPUS & OPUS Projects Joe Evjen, Geodesist, NGS Height Modernization Eastern States Regional Tuesday, March.
Making good from bad: Can we use GPS multipath to measure soil moisture? Kristine M. Larson Department of Aerospace Engineering Sciences University of.
Data centre support for the IGS-RT PP W. Söhne, H. Habrich, G. Weber Federal Agency for Cartography and Geodesy, Frankfurt am Main, Germany.
RECENT ENHANCEMENTS TO THE CDDIS IGS Network Systems Workshop November 2-5, 1998 Annapolis, MD Carey E. Noll Manager, CDDIS NASA GSFC Greenbelt, MD.
6 th Annual Focus Users’ Conference 6 th Annual Focus Users’ Conference Import Testing Data Presented by: Adrian Ruiz Presented by: Adrian Ruiz.
SVY207: Lecture 17 Third party products and GPS processing procedures
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.
Earth, Atmospheric and Planetary Sciences Massachusetts Institute of Technology 77 Massachusetts Avenue | Cambridge MA V F
Global Positioning System Overview
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.
Geodetic Research Laboratory Department of Geodesy and Geomatics Engineering University of New Brunswick 1 UNB3 data management script assessment Thatchineswaran.
Principles of the Global Positioning System Lecture 09 Prof. Thomas Herring Room A;
Principles of the Global Positioning System Lecture 08 Prof. Thomas Herring Room ;
SVY207 Lecture 8: The Carrier Phase Observable
Interacting with Assay Data. Basic Ways to Interact: Experiment: cuts across all assay types Assay: by batch, run or sample.
Applied Research Laboratories The University of Texas at Austin Applied Research Laboratories The University of Texas at Austin Interfacing GPSTk to Existing.
GPS data from receiver to processing input M. A. Floyd T. A. Herring Massachusetts Institute of Technology GAMIT/GLOBK/TRACK Short Course for GPS Data.
Raw data to processing input
GPS measurements in the field
Download/Upload Receipts
GPS data from receiver to processing input
GNSS data from receiver to processing input
Appliance of IceCORS network 2017 by Dalia Prizginiene
Geodesy & Crustal Deformation
GPS: MAJOR COMPONENTS AND
Track Output Interpretation
Utility Programs and Scripts
Automatic Processing with GAMIT
Server Side Includes Server Side Includes (SSI) are simply this:
File Compression Even though disks have gotten bigger, we are still running short on disk space A common technique is to compress files so that they take.
Track Output Interpretation
GNSS data from receiver to processing input
GNSS data from receiver to processing input
GNSS data from receiver to processing input
Presentation transcript:

RECALL THE THEORETICAL JARGON: L1 pseudorange – C/A or P(Y) L2 pseudorange - P(Y) or C2 L5 pseudorange - ignore for now. L1 Phase L2 Phase (can come from either P(Y) or C2 stream) L5 Phase - ignore Doppler - ignore! Signal to noise ratio (SNR)

NOW YOU NEED TO KNOW THE RINEX JARGON L1 pseudorange – C/A = C1 L1 pseudorange – P(Y) = P1 L2 pseudorange - P(Y) = P2 L2 pseudorange - C = C2 L1 Phase = L1 L2 Phase =L2 Signal to noise ratio (SNR) = S1 and S2 Note L1 and L2 are really the names of the GPS frequencies. But RINEX uses the same names for the phase data. This is really unfortunate - but it is the way it is.

RINEX FILES RINEX is a generic term - it refers to a kind of data format. It is ALWAYS ascii. (BINEX is a binary version). o: Observation d: Observation (compressed or Hatanaka) n: Navigation file m: Meteorological data file g: GLONASS Navigation file h: Geostationary GPS payload nav mess file b: Geostationary GPS payload broadcast data c: Clock files

http://igscb.jpl.nasa.gov/igscb/data/format/rinex210.txt RINEX observation file o is the standard observation file d is the compressed observation file Many people call the d file Hatanaka format after Yuki Hatanaka who defined it. You need an extra program to convert compressed to normal observation file. See this link for more details http://www.gsi.go.jp/common/000045517.pdf

Every RINEX file has a header - they are important! 2.11 OBSERVATION DATA G (GPS) RINEX VERSION / TYPE teqc 2012Jun6 gpsops 20120921 00:08:49UTCPGM / RUN BY / DATE 30.0000 INTERVAL 1 1 WAVELENGTH FACT L1/2 7 L1 L2 P1 P2 C1 S1 S2 # / TYPES OF OBSERV Linux 2.4.21-27.ELsmp|Opteron|gcc -static|Linux x86_64|=+ COMMENT 2.10 OBSERVATION DATA GPS COMMENT soc2rnx ver 1.20 gpsops 21-Sep-2012 00:08:49COMMENT S1, if present, is the SNR for the C/A data stream on L1. COMMENT SNR is mapped to RINEX snr flag value [1,4-9] COMMENT SNR: >316 >100 >31.6 >10 >3.2 >0 bad=0 COMMENT L1 & L2: 9 8 7 6 5 4 1 COMMENT GGN USNO OBSERVER / AGENCY KW-0201 AOAD/M_T NONE ANT # / TYPE -1248596.2520 -4819428.2840 3976506.0340 APPROX POSITION XYZ 0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N RT920013101 ASHTECH Z-XII3T IL01-1D04-MCF-12MX REC # / TYPE / VERS AMC2 MARKER NAME 40472S004 MARKER NUMBER There are rules for how these files are written and read. Useful to know that this format (and these rules) are defined by people that use Fortran.

Every RINEX file has a header - they are important! 2.11 OBSERVATION DATA G (GPS) RINEX VERSION / TYPE teqc 2012Jun6 gpsops 20120921 00:08:49UTCPGM / RUN BY / DATE 30.0000 INTERVAL 1 1 WAVELENGTH FACT L1/2 7 L1 L2 P1 P2 C1 S1 S2 # / TYPES OF OBSERV Linux 2.4.21-27.ELsmp|Opteron|gcc -static|Linux x86_64|=+ COMMENT 2.10 OBSERVATION DATA GPS COMMENT soc2rnx ver 1.20 gpsops 21-Sep-2012 00:08:49COMMENT S1, if present, is the SNR for the C/A data stream on L1. COMMENT SNR is mapped to RINEX snr flag value [1,4-9] COMMENT SNR: >316 >100 >31.6 >10 >3.2 >0 bad=0 COMMENT L1 & L2: 9 8 7 6 5 4 1 COMMENT GGN USNO OBSERVER / AGENCY KW-0201 AOAD/M_T NONE ANT # / TYPE -1248596.2520 -4819428.2840 3976506.0340 APPROX POSITION XYZ 0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N RT920013101 ASHTECH Z-XII3T IL01-1D04-MCF-12MX REC # / TYPE / VERS AMC2 MARKER NAME 40472S004 MARKER NUMBER If you are making RINEX files, it is very impolite to leave out the receiver position. For completeness, always include S1 and S2 (many geodesists leave it out - for no good reason).

Every RINEX file has a header - they are important! 2.11 OBSERVATION DATA G (GPS) RINEX VERSION / TYPE teqc 2012Jun6 gpsops 20120921 00:08:49UTCPGM / RUN BY / DATE 30.0000 INTERVAL 1 1 WAVELENGTH FACT L1/2 7 L1 L2 P1 P2 C1 S1 S2 # / TYPES OF OBSERV Linux 2.4.21-27.ELsmp|Opteron|gcc -static|Linux x86_64|=+ COMMENT 2.10 OBSERVATION DATA GPS COMMENT soc2rnx ver 1.20 gpsops 21-Sep-2012 00:08:49COMMENT S1, if present, is the SNR for the C/A data stream on L1. COMMENT SNR is mapped to RINEX snr flag value [1,4-9] COMMENT SNR: >316 >100 >31.6 >10 >3.2 >0 bad=0 COMMENT L1 & L2: 9 8 7 6 5 4 1 COMMENT GGN USNO OBSERVER / AGENCY KW-0201 AOAD/M_T NONE ANT # / TYPE -1248596.2520 -4819428.2840 3976506.0340 APPROX POSITION XYZ 0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N RT920013101 ASHTECH Z-XII3T IL01-1D04-MCF-12MX REC # / TYPE / VERS AMC2 MARKER NAME 40472S004 MARKER NUMBER This means there will be 7 columns of observations, L1 (phase) in the first column, L2 phase in the second, and so on. Since only 5 columns can fit in a line, they have to write the 6th and 7th column on the next line. Rows are saved for satellites. An example on the next page.

top line is year, month, day, hour, minute, second Then number of satellites and their names. G means GPS, R is glonass, and M is Galileo. If there a blank instead of a letter, it means it is a GPS satellite. You cannot assume people will use the G - believe me. GPS came first, so it got to be blank.

Then number of satellites and their names. G means GPS, R is glonass, and M is Galileo. If there is no letter, it means it is a GPS satellite. In this example, there are 9 satellites. They are all GPS satellites.

These are the data for PRN 29. Remember the first two columns are phase (L1 and L2) and then P1, P2, and C1. Last are S1 and S2.

What are the units? Don’t guess - Look it up!

What does F14.3 mean? L1 L2 P1 P2 C1 What is P2?

RINEX Nav Message – clock model +----------------------------------------------------------------------------+ | TABLE A4 | | NAVIGATION MESSAGE FILE - DATA RECORD DESCRIPTION | +--------------------+------------------------------------------+------------+ | OBS. RECORD | DESCRIPTION | FORMAT | +--------------------+------------------------------------------+------------+ |PRN / EPOCH / SV CLK| - Satellite PRN number | I2, | | | - Epoch: Toc - Time of Clock | | | | year (2 digits) | 5I3, | | | month | | | | day | | | | hour | | | | minute | | | | second | F5.1, | | | - SV clock bias (seconds) | 3D19.12 | | | - SV clock drift (sec/sec) | | | | - SV clock drift rate (sec/sec2) | | +--------------------+------------------------------------------+------------+

RINEX Nav file the header is boring

RINEX Nav file The rest of the numbers refer to Keplerian elements - (not needed yet) 16

Where to get RINEX observation data? In Europe, I prefer EUREF http://www.epncb.oma.be In the US, UNAVCO http://facility.unavco.org/data/dai2/app/dai2.html# or CDDIS http://cddis.nasa.gov It can be frustrating to find data that are not archived in these larger data centers.

Where to get RINEX navigation data? I only use navigation quality orbits for my current research, and for years I have gotten these files at SOPAC at garner.ucsd.edu %!/bin/csh ftp -in garner.ucsd.edu << eofuser anonymous kristine@valdemar.colorado.govbinarycd pub/rinex/${year}/${day}mget auto*quiteof where year is, e.g. 2013, day is day of year, 305 It returns auto3050.13.Z, which is unix compressed, so you need to say uncompress auto3050.13.Z There is a smarter command (wget) to pick up files, but I will leave that for you to figure out! 18

their own format, which is called sp3. There are lots of places to find precise orbits. Just google IGS precise orbits and you will find a link to somewhere. They DO NOT use RINEX. They have their own format, which is called sp3. 18