satellite nilesat

Transferred from Http://hi.baidu.com/fenglinggoto/item/ab480234277d254b3075a1d9 Introduction to u-blox A-GPS Solutions GPS applications are becoming increasingly popular. Vehicle Navigation and PDA/PND portable navigation devices are widely used in the market. In addition to combining photos, audio and video playback, it also gradually enters pedestrian walking navigation from Vehicle Navigation, with more emphasis on Location-basedService,LBS), that is, the positioning function extends value-ad

GPS (global positioning system), Global Positioning System:GPS consists of three parts:1. Space:The spatial part of GPS is composed of 24 working satellites. It is located over 20 200km of the earth's surface, evenly distributed on 6 orbital planes (4 in each orbital plane), and the orbital angle is 55 °. In addition, three active backup satellites are running in orbit. The distribution of satellites allows more than four satellites to be observed anywhere and at any time in the world, and the n

Toshiba is one of the established manufacturers of Japanese laptops, and since its first notebook computer T1100 has been released for nearly 30 years, many of the classic products have left a deep impression on people. This year, a Toshiba launched by the home of the satellite l50-a has become the market users focus on products. Satellite series is Toshiba positioning in the mainstream and home entertainm

Model Design reason: GPS provides global, around-the-clock, and real-time navigation Advantages. However, when satellite signals such as high-rise buildings, Boulevard, overpasses, and culvert tunnels are "blind spots, GPS cannot provide users with precise navigation information, especially continuous navigation information. Dr (dead-reckoning) uses a direction sensor (Gyroscope) and a speed sensor (mileage meter) to estimate the instantaneous locatio

Recently in the collation of a list, by the way the country's own launch of the satellite, and cheese together to share the next ~ before we really do not know, originally we launched so many satellites it ~ DomesticSatellite Scientific detection and technical test satellites PracticeSeries The practice of a satellite, the practice of

Rtmp: // 219.232.160.120/livestream/c64024e7cd451ac19613345704f985fa Shenzhen Satellite TV hd-HD image quality rtmp: // 219.232.160.120/livestream/Shenzhen Satellite TV HD-standard image quality rtmp: // 219.232.160.122/livestream/Shenzhen Satellite TV-HD image rtmp: // 219.232.160.122/livestream/d46024701fdfe213f7e7dd8e4fb9a1d2 Shenzhen

The GPS system consists of three parts: the spatial part-GPS satellite constellation; Ground control part-ground monitoring system; User device part-GPS signal receiver. GPS satellite constellationThe GPS working satellite and its constellation are composed of 21 working satellites and 3 in-orbit standby satellites, which are recorded as (21 + 3) GPS constell

From: http://www.linuxidc.com/Linux/2011-09/42454.htm Concepts and basic classes Recently I learned GPS, so I made a GPS signal parsing tool on the Android system (HTC G7 mobile phone). The following is a summary. Thank you for your correction. Function: 1. obtained the location GPS information, including longitude and latitude, speed, and direction. 2. Satellite information, including the number of satellites, elevation angle, azimuth angle, and si

Satellites are widely used and widely available. There are space "messenger" communications satellites, space "remote sensors" Earth resources satellites, space "weather stations" meteorological satellites, Space "guide" navigation satellites, space "spy" reconnaissance satellites, space "broadcast satellites", space "altimeter" satellites, Space "clairvoyance" astronomical satellites and so on. The formation of a large "satellite family."The composit

GPS data packet Parsing After GPS power-on, data in a certain format will be returned at a certain time. The data format is:$ Information type. The characters starting with '$' are x, and X ', the information type is followed by data separated by commas.The complete data of a row is as follows:$ Gprs mc, 080655.00, A, 4546.40891, N, 12639.65641, E, 1.045, 328.42, 170809, A * 60 Information type:Gpgsv: Visible satellite informationGpgll: Location I

Original site: http://www.cnblogs.com/magicboy110/archive/2010/12/09/1901669.htmlThere are many professional materials about GPS theory on the network, and this paper tries to introduce the basic principle of GPS positioning in a way that programmers can easily understand, hoping to enlighten the friends who do GPS development. Of course, this article does not involve specific development aspects of the technology.A mathematical model of GPS positioningThe first reason to introduce a mathematic

: $ gpgsa, statement ID, indicating the current satellite information of gps dop and active satellites (GSA)Field 1: positioning mode, a = Automatic manual 2D/3d, M = manual 2D/3DField 2: positioning type, 1 = undetermined, 2 = 2D, 3 = 3DField 3: PRN code (Pseudo-Random Noise Code), number of the satellite PRN code used by the 1st channel (00) (0 if the number of leading digits is insufficient)Field 4: PRN

longitude) Field 6: GPS status, 0 = undetermined, 1 = non-differential positioning, 2 = differential positioning, 3 = Invalid PPS, 6 = being estimated Field 7: number of satellites in use (00-12) (0 if the number of leading digits is insufficient) Field 8: hdop horizontal precision factor (0.5-99.9) Field 9: altitude (-9999.9-99999.9) Field 10: height of the earth's elliptical sphere relative to the geolevel Field 11: differential time (the number of seconds from the last time the d

Positioning Technology Gps/a-gps/lbs/wifi positioning IntroductionSource: Site Finishing Author: 08lr.cn update: May 03, 2013 popularity: 9 this week: 19 this month: 34 total: 2,134 times In life, we often see the so-called mobile phone positioning of the application, for the tracking technology can not be incredible, we will think: How to do this? With today's positioning technology, a certain degree of precision and accurate tracking can be achieved, even beyond your imagination. All sorts of

on the ground. Integrated GPS Positioning requires the built-in GPS module of the mobile phone. However, this module only has the receive function and does not have the launch function. 24 GPS satellites are constantly transmitting information containing time, satellite points, and other important parameters to the earth. After receiving the information from our mobile phone, the mobile phone calculates the distance from the mobile phone to each

satellite information of gps dop and active satellites (GSA)Field 1: positioning mode, a = Automatic manual 2D/3d, M = manual 2D/3DField 2: positioning type, 1 = undetermined, 2 = 2D, 3 = 3DField 3: PRN code (Pseudo-Random Noise Code), number of the satellite PRN code used by the 1st channel (00) (0 if the number of leading digits is insufficient)Field 4: PRN code (Pseudo-Random Noise Code), number of the

Recently engaged in GPS receivers, learn to view NMEA-0183 data protocolsCode The NMEA data is as follows:$ Gpgga, 121252.000, 3937.3032, N, 11611.6046, E, 2.0, 45.9, 5.7, M,-0000, M, * 77$ Gprs mc, 121252.000, A, 3958.3032, N, 11629.6046, E, 15.15, 359.95, 070306, A * 54$ Gpvtg, 359.95, T, M, 15.15, N, 28.0, K, A * 04$ Gpgga, 121253.000, 3937.3090, N, 11611.6057, E, 1.2, 44.6, 5.7, M,-0000, M, * 72$ Gpgsa, A, 3, 14, 15, 05, 2.1, 18, 26, 1.2, 1.7 * 3D$ Gpgsv, 84,067, 67,067, 49,312, 47,231, 30

observation technology makes the sensor species more and more, the accuracy is more and more high, the information is more and more abundant. For example, three-dimensional laser scanning system, can get 1 million points of data per second, the information obtained in addition to the target object's spatial coordinate information, there are reflectivity information and texture information (Bin Li, 2012). In addition to the existing mapping geo-information data, human data sources now include a

Access network refers to the "user interface and Business node interface between the implementation of the host function of the entity." Access network basically includes transmission system, multiplexing equipment, user/network interface, digital crossover equipment, etc., usually access network transmission system according to the transmission medium into wired access and wireless access. Wireless access technology has a variety of classification methods, according to the transmission rate, th

determines the strategic direction. In our management consulting practices, we also encountered an example of the "Cage Effect". We conducted organizational design and human resources system changes for an enterprise. During management diagnostics, we found that the company has the following Architecture: President, Executive President, and executive vice president. According to our function analysis, the chief executive officer here is basically an "empty bird cage", but this position has bee