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Static survey mode

Wednesday, April 18th, 2007

Step of manipulation:

Tripod is accurately centered and leveled over the point (the point could be known point or unknown point)

Position the receiver base or rover on the tripod. Switch the receiver to static mode, remains pressing the key when you hear beep 5 times then loosen the key, the receiver will be power off continue to power on it will be switch to static mode.

Download raw data from receiver to your computer (the method is the same of 9600 polaris). The default collecting interval is 5 seconds, mask angle is 10 degree, if you want to change the collecting interval, you must use handhold computer to change it.
For the base:you must connect handhold computer to the base by cable.
Steps:

Click set receiver set, select static mode.

You can set the static collection parameter such as collection interval and mask angle . The unit for collection interval is second, mask angle is degree. Click ok, the engineering star program will exit. Check the indicator light ont he mainframe you will find the dl indicator light lights and sta indicator light blink as your setting (for example the light blinks every 3 seconds if you se the interval to be 3 seconds)

For the rover:

you can connect handhold computer to the rover by bluetooth or cable. The step is the same as base.

Connect all components of rtk

For base:

Tripod is accurately centered and leveled over the point. (the point could be known point or unknow point

Position the base mainframe on the tripod

Connect the radio (transmitter-receiver) to base mainframe with all purpose cable (the cable has two functions: provide power and transfer data)

Connect emitting-anternna to the radio (transmitter receiver)

5 power on base mainframe and radio (15 w or 25 w, adjustable. The base will begin to transmit differential signal after a few minutes, (the time needed mainly depend on the status of the  satellite)

Matters needing attention

Try to set base on open area, apart from the trees and buildings, avoiding using interphone or mobile phone, far from the tower of electromagnetic wave transmitter and high tension cable.

Before you power on the base mainframe and radio, please make sure the transmitting antenna is attached to the radio. Otherwise, it will probably burn the radio.

You must make sure the voltage of external power is more than 12,8v or it probably don’t transmit differential signal or it is difficult to get fixed solution.

WHen the base is transmitting signal, the indicator light on mainframe (the second light, will blink one every second.

 


RTK S82 STAKEOUT LINE

Wednesday, April 18th, 2007

Click survey-stakeout line to stake out lines, click button to open the coordinates library of layout line. If there exist line file , you can click open to pen the line file (the file’s suffixal name is .1nb) then select line to stake out. If there does not exist line in the coordinate library, you need to click add to input the coordinates of the start point and the end point to create a new stakeout line. If the mileage information is required, enter the mileage of start point in the screen of figure 3-35 thus you can view the current mileage informations. (the mileage hereby means the mileage of the interesction point of the vertical line start from current point to the straight line) Excursion: 1,341 means when you walk along the line from the start point to the end point, the current point is on the right of the line, so you need to move left towards the line. you can clcik to select the point as start point or end point. You can set the range of sound prompt. Figure which shows the minimum range to alarm is 1m, compared with the maximum range is 3m. In the figure you can see three lines parallel to the stakeout line, the distance between the nearest line the layout line is 1m, compared with the distance between the furthes and the stakeout line is 3m.

 

 

Stakeout point

Wednesday, April 18th, 2007

Click survey stakeout point to enter stakeout screen. Click the button to open the stakeout coordinate library.Click open to open stakeout file. The file type is .dat. Then you can oper the existing file .dat. You can choose to overwrite or to add. If you choose overwrite, the original stakeout point will be replaced. If you choose add, the new point to be stakeout will append to the layout coordinate lib. The latter is the recommended mode. Three points which belong to the file 928.dat added to the layout point library after selecting add. Select the point you want to staked out, then click ok or you can aslo click add to input the coordinates to layout coordinate lib directly. You can see the distance between the current point and the target point is 0,004 the dx 0,002m the dy 0,003m you need to move toward the south and the west. Click you can set the range of sound promt. In the figure the there circles aroudn the target point indicate the distance between the current position and the targe point. When the distance is within the set value, there will be alarm signal (you will hear a sound promt when you are in or out the range).

You can synchronously store point when you’re staking out points. Click s or press button a to store the current point. Press button 8 to stakeout the previous point and buttone 2 to stake out the next point, button 9 is to look for points.

 

 

 

SURVEY SAVE POINT

Wednesday, April 18th, 2007

Select survey object survey begin to measure when the status is fixed or press “a” to save current coordinate. The default point name is point, input the antenna height.

The position symbol is displayed in two ways, when the antenna is still or moving within 2cm it will display as roundness, when the antenna is moving, it will display as a triangle and the direction of the acute angle is the moving direction.The point name will add up automatically when saving, you can also change the point name. Ant. Height on the above figure is the height of the antenna phase center. After the point is stored and open the library, you can see the height of the point which is that of the surveying point.

You can see four save tupe. In most condition, we choose general save.

You can browse point information, satellite distributing, satellite list, base information and other information with this function.

You can browse all parameter about your job.

You can browse all surveyed point. Rapresent the solution is fixed rapresent the solution is float rapresent the solution is single.

 

GPS SURVEYING RTK S82

Wednesday, April 18th, 2007

Calculate conversion parameter

The control point library is used to calculate the conversion parameter. We use two known points coordinates (point a and point b) to calculate the conversion parameter, firstly we must note down the original coordinates of these two points, which are obtained by the rover in the fixed status without any conversion parameter. Input the know coordinate of point A in the control point library, and then enter the original coordinate of point a according to the prompt. The conersion parameter will be calculated after entering the known coordinate and original coordinate of point b. Click set coordinate lib to opern the control point library. Add, delete and edit buttons are the relevant operation to the know coordinates and original coordinates of known points. The button on/off is the oprtion of place calculation or altitude calculation. Oper button is to open an exist conversion file. Save button is to save a file of conversion parameter. Click add to input known coordinate and original coordinates of known points. You can input coordinate directly or click to select the coordinates from coordinate lib.Thesoftware will guide to continue step by step. Int he above dialog box, you can click add to ad known point coordinate or click import to open the file which the known point’s coordinate is in. After inputting the known coordinate of a point, the software will guide you to input its original coordinate we choose add from cor library.
Note: int he above figure there are four methods to input the original coordinates First, add the coordinates from coordinate library. Second, read the coordinates of the current position (to save an original coordinates when the rover keep centered and leveled) Third, read the coordinates fo base station (to read the original coordinate when the base station is on the know point) Fouth, input the geodetic coordinates. We reccomend the first method. Now we get back to coordinate lib again, you need to click inport to open the file, which the known point’s original coordinate is in. The icon represent original coordinate.

Note: in general plane conversion needs two points at least, and the altitude fitting needs three point s at least. IF a Benchmark has no plane coordinates, you need to get this point’s coordinate first and change the altitude surveyed to the known altitude. Before saving the file, you’ d better check wheter the plane accuracy and altitude accurcay meet the requirement. (more…)

RTK S86 CREATE NEW JOB

Wednesday, April 18th, 2007

Click job, new job. Type in or select the coordinate system and projection information step by step as following: job name, ellipsoing system selection, projection parameter, conversion parameter. If it is a new job. (it is the first time for you to use the job or you don’t know the information of conversion parameter) you needn’t input the value of four parameters, seven parameters and altitude fitting parameter. When you calculate conversion parameter later, the blank will be input automatically. Confirm the options to finish the job creation. (this kind of job creation is called “WIZARD”

Create a new job before survey, the job will be saved in the path. There are two new files, which named data and result in the jobs content. The data folder saves the result of surveying, and the result folder saves the files of stake-out setting (stake-our straight line files and stake-out curved line files etc). If you choose copy please input a job name and click ok, then select the existed file in the directory management screen, thus all parameter of the new job are the same with that of the selected one.

 

 

 

RTK SURVEY MODE - CONNECT ALL COMPONENTS OF S82

Wednesday, April 18th, 2007

For base:

1 tripod is accurately centered and leveled over the point (the point could be known point or unknown point)

2 position the base mainframe on the tripod.

3connect the radio (transmitter-receiver) to base mainframe with all-purpose cable (the cable has two functions: provide power and transfer data)

4 Connect emitting-antenna to the radio (transmitter-receiver)

5 Power on base mainframe and radio (15w or 25w, adjustable)

The base will begin to transmit differential signal after a few minutes (the time needed mainly depend on the status of the satellite)

Note:

You can find four indicator lights and a key-press on the panel. From left to right:

indicates current status, the light remains light in the rtk mode and blinks in static mode (for example, the light blinks every 5 seconds if you set the interval to be 5 seconds).

Dl indicates status of data link, the light will blink twice quickly every five seconds in rtk base mode. For the rover, the light blinks every second. In static mode, the light will light all long time for base and rover.

Indicates status of satellite and the connection of bluetooth, the light has two colour, the left one indicates the satellite’s status, it will blink every 30 seconds (for example if the light blinks six times it rapresent the receiver fixed six satellites) The right one will light all long time is the handhold computer is connected to rover with bluetooth.

Indicates status of the power. When power supply is enough the light remains light all long time, otherwise, it will blink clue to replace battery. When power is external power, the right light will light (green).

Has two functions: power on/off and switch survey mode (for example, remains pressing the key, whe you hear beep 3 times then you loosen the key quickly, it will power off the receiver, when you hear beep 4 times then loosen the key, the receiver will be power off, continue to power one, it will be switch to rtk mode; when you hear beep 5 times then loosen the key, the receiver will be power off, continue to power on, it will be switch to static mode; when you hear beep 6 times then loose the key, the receiver will be power off, continue to power on, it will initialize the receiver.

For rover:

The manipulation is simple compared to the base. Attach the radio antenna to rover and power on, the rover receiver will begin to receiver differential signal and get into fixes status in a few minutes. The panel is the same as base.

 

Has two functions: power on/off and switch survey mode

 

 

 

 

APPLICATION OF S82 RTK GPS

Wednesday, April 18th, 2007

Brief introduction about S82.

S82 is the latest integrative rtk, which integrate antenna, mainboard, radio, bluetooth module, battery module. For rover system, all needed is a handhold computer, for base system. It can work with external radio, emitting antenna, and external power.

1Building block system structure (bbss). The transmitter-receiver of s82 nests the bottom of the mainframe by building block system, which can avoid intereference problems caused by puttting the internal transmitter-receiver board close to the mainboard.

2Autorover- The rover can search differential signal of the base and change channel automatically as it is powered on.

3 One key on

There is only one key button on the mainframe. It is very easy to power on, shut down, initialize receiver and switch between rtk mode and static mode. The operation is greatly simplified and personalized.

4 Automatic switch between two batteries. The two batteries can switch automatically, thus prolongs working time effectively.

5 Double ports (usb, com) rapid data transfers, big memory (32m)

Besides the com port start s82 provide usb mode to transmit raw data. 32M memory can satisfy continuous static data collection for over 40 hours at 5 seconds intervals. The storage time could be longer, if the interval becomes longer.

 

 

Post-processing data of tracking mode

Wednesday, April 18th, 2007

Create new project (the same as control survey mode). Add raw data. Input known point ( the same as control survey mode). Post-processing raw data. Click track it will begin to process data and display the current process. After processing, it will display the shape of tracking.Output result. Click report track report it will output the result.

 

 

 

APPLICATION OF TRACK MODE GPS

Wednesday, April 18th, 2007

Raw data collect. For base, the method of data collecting is the same as control survey mode. For rover: you should choose track mode on the initial interface. Set collecting condition. If you set collecting interval to be 5 seconds and set the times of collection to be 3 times, it will take you 15 seconds to survey a points (interval 3 seconds and times 2, the time will be 6 seconds for every point, for example). When the condition is satisfied, mainframe will enter collecting status atuomatically. The interface is shown as figure. Note that the collection condition is satisfied means: NAV mode is 3d, pdop is less than 6.0 and locked satellites are more than 4.

Rover initialization.

Fix the rover on a point. Press F1 to initialize. The time needed in initializing course is 5 minutes, so i’ts critical to remian the rover immobile during initializing course. You’d better have a set of prism tripod to fasten the receiver. In the course, the corresponding screen menu will change into survey. When initialization is completed, the long beep wil tip you. After initialization, press F1 survey, mainframe will enter surveying status. when you reach the point which you want to survey, press F2 to save (the time needed depend on your setting) after hearing the beep, move to next target to collect. After complete data collecting, press F1 to initialize again (to get higher accuracy we suggest you initialize the receiver every hour). At last, press key and hold for a moment to exit the collecting program and all data will be stored automatically. Download raw data. The method of downloading is the same as control survey mode.