Sichuan Total Station Company reminds you that as a surveyor,sometimes you often use RTK for static data collection.At this time,you need to select the static mode to collect data.Static station settings include two aspects:option settings and antenna parameters.The following describes various parameter settings in detail.

　　Option Settings

　　Roll Call:The roll call for static data.

　　PDOP limit:The spatial geometric intensity factor of satellite distribution.Generally,when the satellite distribution is better,the PDOP value is smaller,and less than 3 is the ideal state.Height cutoff angle:The angle between the connecting line between the satellite and the receiver and the horizon.The receiver does not receive satellite signals smaller than the cutoff angle.Value range:0-45 degrees.

　　Collection interval:1HZ means to collect one data per second,5HZ means to collect five data per second,5s means to collect one data per five seconds,and so on.Automatically record static data:If"Yes"is selected,recording will automatically start when the receiver is powered on and receives the satellite signal;If you select"No",you need to manually set the start of recording static data after starting up.

　　Antenna parameters

　　Measuring height:generally refers to the height from the measuring position to the ground point.Antenna height:generally refers to the vertical height h from the antenna phase center to the ground point.

　　B:The height from the bottom of the instrument to the phase center p.c;c:The height from the bottom of the instrument to the rubber ring;R:The radius of the machine rubber ring.When the equivalent value is the vertical height a from the ground point to the bottom of the main engine,it is measured in the"pole height"mode.Antenna height h=a+b.When the equivalent value is taken from the ground point to the phase center,it is measured in a"straight height"manner.Antenna height h=h.When the equivalent value is the slope height s from the ground point to the sealing rubber ring,it is measured as"slope height".Antenna height h=sqrt(s2-R2)-c+b(sqrt refers to square root).

　　Altimeter:A device fixed to the bottom of the instrument to measure the length from the ground point to the edge of the altimeter(i.e.,the slope height S of the altimeter).At the same time,if the radius of the altimeter is known to be Rc,then the antenna height h=sqrt(S2-Rc2)+b.

　　Antenna height:The vertical distance from the phase center of the antenna to the measurement point.Since it is not possible to measure it directly,it is generally calculated using other measurement methods.Input the measurement height and select the measurement method to obtain the antenna height value.After setting various parameters in the static station settings,click[Apply]to modify the receiver's working mode to static mode.

　　Advanced Configuration

　　Satellite system:The satellite system setup includes five satellite systems,namely,"GPS","GLONASS","BEIDOU","Galileo",and"SBAS"systems.The Galileo satellite should be displayed based on whether the connected instrument supports it.Depending on the needs of the measurement work,you can choose whether to receive signals from the corresponding satellite system.

　　SBAS:Wide-area differential enhancement system(satellite based enhancement system),which consists of a large number of widely distributed differential stations to detect navigation satellites and transmit the obtained raw data to the main console.The main console then calculates various positioning correction information for each satellite and sends it to the GEO satellite through the uplink injection station.After Z,the GEO satellite will broadcast the correction information to the majority of users,which is conducive to improving positioning accuracy.After setting various parameters in the static station settings,click[Apply]to modify the receiver's working mode to static working mode.

　　This issue describes the methods for setting static stations from two aspects:option settings and antenna parameters.The next issue will provide tips for viewing the job information and status of the data link selected by the current receiver.