The difference between gis station and traditional station

GPS is a global positioning system, which mainly determines the position.

GIS is a geographic information system and data processing platform.

RS is remote sensing, which mainly provides data.

2. The data processed is different.

GPS mainly deals with position, speed, time and so on.

RS mainly deals with pictures;

Main management data of GIS;

Step 3 contact

After data collection, GPS and RS can be provided to GIS platform for processing.

Extended data:

GPS module

1, blank part

The space part of GPS consists of 24 satellites (2 1 working satellite; 3 backup satellites), located above 20200km from the earth's surface, with an operation period of 12h. Satellites are evenly distributed on six orbital planes (4 satellites per orbital plane) with an orbital inclination of 55.

With the distribution of satellites, more than four satellites can be observed anywhere in the world at any time, and navigation information can be pre-stored in satellites. Because of atmospheric friction and other problems, the navigation accuracy of GPS satellites will gradually decrease with time.

2. Ground control system

The ground control system consists of monitoring station, main monitoring station and ground antenna. The main control station is located in Springfield, Colorado, USA. The ground control station is responsible for collecting information returned by satellites and calculating satellite ephemeris, relative distance, atmospheric correction and other data.

3. User equipment part

The user equipment part is a GPS signal receiver. Its main function is to capture the satellites to be tested selected according to a certain satellite cutoff angle and track the operation of these satellites. When the receiver captures the tracked satellite signal, it can measure the pseudo-range from the receiving antenna to the satellite and the change rate of the range, and demodulate the satellite orbit parameters and other data.

According to these data, the microprocessor in the receiver can calculate the position according to the position calculation method, and calculate the latitude, longitude, altitude, speed, time and other information of the user's geographical position. The receiver hardware, internal software and GPS data post-processing software package constitute a complete GPS user equipment.

The structure of GPS receiver is divided into two parts: antenna unit and receiving unit. The receiver generally adopts two kinds of DC power supplies: internal and external. The purpose of setting internal power supply is not to interrupt continuous observation when replacing external power supply. When using off-board power supply, the battery will automatically charge. After shutdown, the battery in the machine supplies power to the RAM memory to prevent data loss.

Various types of receivers are getting smaller and lighter, which is convenient for field observation. Secondly, there are two kinds of user receivers: single-frequency and dual-frequency, but due to the price factor, most users buy single-frequency receivers.

Baidu encyclopedia -RS

Baidu Encyclopedia-Geographic Information System

Baidu encyclopedia -GPS