GPS World, June 2016
10 5 0 5 10 15 20 25 90 80 70 60 50 40 30 80 70 60 50 40 30 20 ACKNOWLEDGMENTS The Mahali project is funded by a National Science Foundation Integrated NSF Support Promoting Interdisciplinary Research INSPIRE grant We would also like to acknowledge our collaborators at Boston College Virginia Tech Johns Hopkins University the University of New Brunswick and Colorado State University as well as the support of UNAVCO for loans of dual frequency GNSS receivers for use in this project We also thank Intel for loans of mobile smartphones Travel to Brazil was kindly supported by the MIT International Science and Technology Initiatives program This article is based on the paper A Smartphone App for GNSS Ionospheric Data Collection Initial Field Test Results presented at ION GNSS 2015 the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation held in Tampa Fla Sept 14 18 2015 MANUFACTURERS The GNSS receivers used for our tests in Brazil included a NovAtel novatel ca GPStation 6 GNSS Ionospheric Scintillation and TEC Monitor GISTM receiver and earlier generation NovAtel GSV4004B GISTM receivers We employed Samsung samsung com Galaxy S3 and Motorola motorola com Moto G smartphones ANDREW KENNEDY is a doctoral candidate in the Space Telecommunications Astronomy and Radiation Laboratory at the Massachusetts Institute of Technology MIT in Cambridge Mass RYAN KINGSBURY is a recent doctoral graduate from the Space Telecommunications Astronomy and Radiation Laboratory at MIT ADVERTISER INDEX COMPANIES FEATURED IN THIS ISSUE ADVERTISER PG CAST NAVIGATION 9 19 CHC NAVIGATION 32 61 COMNAV TECHNOLOGY 21 59 EFFIGIS 14 GENEQ 64 GPS SOURCE 22 23 HARXON 49 HEXAGON 51 INTERGEO 66 IFEN 13 25 INSTITUTE OF 16 NAVIGATION KVH INDUSTRIES 5 NOVATEL 27 BACK COVER RACELOGIC 29 55 ADVERTISER PG RAKON 46 ROHDE SCHWARZ 7 SBG SYSTEMS 57 SEPTENTRIO 63 SKYDEL 31 INSIDE BACK COVER SPECTRACOM 11 33 SPECTRATIME 47 SPIRENT FEDERAL INSIDE FRONT COVER 35 SUZHOU FOIF CO 62 SWIFT NAVIGATION 15 37 TALLYSMAN 39 53 TELEORBIT 65 UNICORE 12 41 COMMUNICATIONS WANG ELECTRO OPTO 34 30 Geodetic longitude degrees Geodetic latitude degrees TEC 10 Manaus São José dos Campos FIGURE 7 Total electron content in TECu across South America on Feb 5 2015 between 19 00 UTC and 19 15 UTC The Locating Company Technology licensed by Fraunhofer IIS Ultra wide GNSS bands providing highest flexibility and performance Find the latest news on our GNSS constellation and signal simulation environment at www teleorbit eu Modular RF Front End with up to three GNSS Bands GPS GLONASS Galileo BeiDou QZSS IRNSS SBAS JUNE 2016 WWW GPSWORLD COM GPS WORLD 65
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