GPS World, May 2011

THE SYSTEM Base both in New Mexico for use by the National PNT Engineering Forum NPEF LightSquared Working Group These results will be considered for inclusion in the TWG Final Report by the aviation sub team Presumably this group will test military receivers under classified categorization The aviation receivers are representative of those in use today Their selection was based mainly upon device availability those already owned by the FAA Technical Center They are Canadian Marconi GLSSU 5024 Garmin 300XL Garmin GNS 430W Garmin GNS 480 Rockwell Collins GLU 920 multimode receiver Rockwell Collins GLU 925 multimode receiver Rockwell Collins GNLU 930 multimode receiver Symmetricomm timing card used for an FAA automation system WAAS NovAtel G II ground reference station and Zyfer timing receiver used for the WAAS ground network Cellular Sub Team The cellular subteam is in the process of engaging PC TEST Columbia Maryland CETECOM Milpitas California InterTek Lexington Kentucky and ETS Lindgren Cedar Park Texas for device testing The cellular sub team expects to test approximately 50 different device models The selections represent current and legacy devices and have been prioritized based on sales volumes While it is expected that there will be some representation of dataonly devices and femtocells the testing will focus largely on handheld devices Those designated for testing are Apple iPhone 4 GSM and CDMA HTC A6366 HTC ADR6200 HTC ADR63002 HTC ADR63003 HTC ADR6400L HTC Touch Pro 2 LG Lotus Elite LG Rumor Touch LG VN250 LG VS740 LG VX5500 LG VX5600 LG VX8300 LG VX8360 LG VX8575 LG VX9100 LG VX9200 Motorola A855 Motorola DROID X Motorola VA76R Motorola W755 Nokia 6650 Nokia E71x RIM 8330C RIM 8530 RIM 9630 RIM 9650 RIM 9800 Samsung Moment Samsung SCH U310 Samsung SCH U350 Samsung SCH U450 Samsung SCHU640 Samsung SCH U750 Samsung SGHi617 Samsung SGHi917 Sierra Wireless 250 U USG 3G 4G and Sony Ericsson W760a General Location Navigation This sub team has chosen Alcatel Lucent as its initial facility for testing Twentysix devices were selected based on nominations by manufacturers represented on the sub team considering the percentage of the installed user base They include Garmin Forerunner 110 and 305 Garmin ETREX H Garmin FIGURE 3 GLONASS K satellites code minus phase data courtesy of JAVAD GNSS GLONASS CDMA continued the L3 GLONASS band Data was logged at the companys Moscow office on April 8 from 02 30 until 07 30 UTC The satellites pseudorange in chips and signal to noise ratio in relative numbers are shown in FIGURES 1 and 2 they may be enlarged for closer viewing at www gpsworld com GLCDMA On April 11 the satellites code minus phase and signalto noise ratio were tracked FIGURES 3 and 4 Data quality is quite similar to GPS according to the company Future GLONASS satellites of the K1 and subsequent K2 generations will broadcast CDMA signals in multiple FIGURE 4 GLONASS K satellites signal to noise ratio courtesy of JAVAD GNSS frequency bands GLONASS K satellites are markedly different from their predecessors They are lighter use an unpressurized housing similar to that of GPS satellites have improved clock stability and a longer 10 year design life There will be two versions GLONASS K1 will transmit a CDMA signal on a new L3 frequency and GLONASS K2 will in addition feature CDMA signals on L1 and L2 frequencies The CDMA signal in the L3 band has a center frequency of 1202025 MHz The new generations of GLONASS signals and satellites are described in detail in the April 2010 Innovation column of GPS World edited by Richard Langley and GPS World May 2011 www gpsworld com 12