gps_count=0;//0xff; ///GPS_ENABLE; GPS_WDG1=12;//12-2=10 s. return; ///goto gps_end; } else if(gps_count>68)//GSV'S MAX TOTAL LENGTH =68 BYTE. { GGA_Flag=0; gps_count=0;//0xff; ///GPS_ENABLE; ///GPS_WDG1=12;//12-2=10 s. return...
There is interest in the application of the GPS for navigation of satellites with altitudes greater than that of the GPS constellation itself. Candidate missions include geostationary (GEO) and High Earth Orbit (HEO) satellites, particularly those with large eccentricities. The challenges for HEO ...
太空部队(Space Force)需要升级现有的武器系统和平台,以适应M-code信号的使用。M-code是一种更强大、加密的军用GPS信号,可以提供更安全和可靠的军事位置导航和定时(PNT)信息。 为了满足这一需求,军事部门需要购买和开发大量具备M-code能力的GPS接收器。此外,太空部队正在开发第二代M-code芯片和以及手持接收器。然而,...
A simple combination procedure for a more economical processing of code tracking and carrier phase measurements obtained from the GPS Navstar Satellites is presented. The position processing algorithms are simplified by combining code measurements with integrated Doppler measurements into a combined pseudorange...
Let's add the bits of code to our project. Java Shrink ▲ importcom.google.android.maps.GeoPoint;importandroid.content.Context;importandroid.location.Location;importandroid.location.LocationListener;importandroid.location.LocationManager;privateLocationManager locationManager;privateLocationListener locationListener;...
A new spread-spectrum code-acquisition technique for the navigation systems Navstar/GPS and Glonass is introduced. This technique uses the FFT to compute the correlation function, thereby eliminating the time-consuming code phase shift process. Comparisons with existing systems show a theoretical reductio...
As Fischer observes, “M-Code is the next evolutionary step in a very successful GPS program, making both the military and civilian PNT solutions more resilient. In particular, the M-Code encryption provides badly-needed defensive improvements to the GPS signal.”...
The final steps to fully-enable the ultra-secure, jam-resistant Military Code (M-Code) signal on the Global Positioning System (GPS) are now underway, Bethesda, MD-basedLockheed Martinannounced March 27. As part of the U.S. military’s effort to modernize GPS, the U.S. Space Force has...
Jwo D, Lai J. Minimum error entropy based EKF for GPS code tracking loop. Comput Mater Contin. 2021;67(3):2883-2898 https://doi.org/10.32604/cmc.2021.015102 IEEE Style D. Jwo and J. Lai, “Minimum Error Entropy Based EKF for GPS Code Tracking Loop,”Comput. Mater. Contin., vol....
Determination and use of GPS differential code bias values GPS/GLONASS P1-P2 as well as GPS P1-C1 differential code bias (DCB) values are computed at the CODE analysis centre on a regular basis. The two methods tha... S Schaer,P Steigenberger - 《Igs Workshop》 被引量: 101发表: 2006...