Tool kits by Garrett Seepersad
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GNSS Hardware Database
Database of over 150 different types of GNSS receivers |
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GNSS Product Downloader
Web based application that retrieves GPS satellite clock and orbits |
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Date Conversion Utility
Web based application that convert dates from common time systems to GPS week + DOW, Year + DOY, MJD, Decimal year and YYYY/MM/DD |
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Automated downloading of IGS reference station observation files and IGS satellite products
Script utilizes MATLAB and bat scripts to connect to an FTP server to automatically download receiver and satellite data sets for processing. Re-computation of the calculations from Collins (1999), "An overview of GPS inter-frequency carrier phase combinations."
Collins (1999) examined the inter-frequency combinations available from dual frequency GPS carrier phase observations. The presented spreadsheet shows the re-computation of Tables 1 to 5. |
Other useful tool kits
A Brief Review of Basic GPS Orbit Interpolation Strategies
by Mark S. Schenewerk Compare different techniques to interpolate GPS precise ephemerides in SP3 format. 
TEQC multipath metrics in MATLAB
by Clement Ogaja, and Jim Hedfors A MATLAB program for creating colorized maps of high frequency multipath using TEQC report files of single-epoch data. The maps, although not necessarily indicating the actual local direction of multipath on the ground, give the orientation with respect to the geometry of the satellites in the sky. 
Finding repeat times of GPS constellation
by Duncan Carr Agnew and Kristine Larson Two programs for finding repeat time, one using the orbital period and the other the topocentric positions of the satellites. 
Estimating GNSS satellite and receiver differential code biases
by Rui Jin, Shuanggen Jin, and Guiping Feng Code to estimate GNSS satellite and receiver DCBs for time intervals from hours to days. 
GNSS Format Descriptions
by gAGE Explains the different RINEX standards with explanatory tooltips. The tooltips are triggered automatically when the mouse is hovered over a field. Explanations include the standard description of the field, the format in which is written and,units. |
GPS MATLAB Tools
by Kai Borre Routines illustrate how to: read Ashtech B-, E-, an S-files; compute satellite coordinates from Keplerian elements; form a double- differenced phase and range observable; convert between geodetic and topocentric coordinates; solve for integer ambiguites; and create autocorrelation and power spectrum plots 
Klobuchar Ionospheric Model
by Ola Ovstedal Subroutine for computing an Ionospheric range correction for the GPS L1 frequency from the parameters broadcasted in the GPS Navigation Message. 
Second- and third-order ionospheric corrections for RINEX observation files
by A. Marques, J. Monico and M. Aquino Software tool developed to correct GPS observables for second- and third-order ionosphere effects. RINEX_HO requires as input a RINEX observation file, then computes the second- and third-order ionospheric effects, and applies the corrections to the original GPS observables, creating a corrected RINEX file. 
An ActiveX control for embedding GPS capability in custom applications
by K. Khan, G. Akhter, and Z. Ahmad An ActiveX GPS control is presented which can be used to develop software applications with GPS functionality. |
