What is ground Stabilisation in radar?
What is ground Stabilisation in radar?
In ground stabilization mode true motion display of Radar is used & the Course & Speed is fed from GPS, hence the fixed objects on the PPI remain stationary. The movement of all moving objects is their movement over ground (COG & SOG). It is used for collision avoidance with fixed objects.
What is a stabilized radar display?
The North-Upward display in which the orientation of the display is fixed to an unchanging reference (north) is called a STABILIZED display. Some radar indicator designs have displays which are both stabilized and Heading- Upward.
What is sea and ground Stabilisation?
There are two stabilisation modes – ground and sea. Ground stabilisation means that the display is referenced to the seabed by GNSS or through a twin-axis Doppler log. For sea stabilisation the display is referenced to the sea current that own ship is experiencing, typically based on SDME measurements.
What does ground stabilized mean?
Ground stabilization:- In ground stabilization mode true motion display of Radar is used & the Course & Speed is fed from GPS, hence the fixed objects on the PPI remain stationary. The movement of all moving objects is their movement over ground (COG & SOG). It is used for collision avoidance with fixed objects.
What are the limitations of radar?
Some of the important limitations of Radar are as follows:
- Small vessels, ice, other small floating objects may not be detected by the radar.
- Targets in the blind sector and shadow sector of the radar are not displayed.
What is difference between sea stabilization and ground stabilization?
In ground stabilization mode true motion display of Radar is used & the Course & Speed is fed from GPS, hence the fixed objects on the PPI remain stationary. In sea stabilization mode relative motion display of radar is used & the Course is from Gyro course and speed is from log speed.
Is the most accurate radar fix?
1310. Since radar can more accurately determine ranges than bearings, the most accurate radar fixes result from measuring and plotting ranges to two or more objects.
Is it a requirement for an ARPA to be sea and ground stabilized?
1 The ARPA should be capable of sea and ground stabilization. 3.11. 2 Log and speed indicators providing inputs to ARPA equipment should be capable of providing the ship’s speed through the water in the fore and aft direction.
What are the three limitations of radar?
Limitations of RADAR are:
- It is the ability of the RADAR set to clearly distinguish two small targets on the same bearing at slightly different ranges.
- It is the ability of the radar set to clearly extinguish two targets of the same range and slightly different bearings.Factor affecting bearing discrimination : HBW.
What is soil stabilization?
Soil stabilization is defined as chemical or physical treatments which increase or maintain the stability of a soil or improve its engineering properties.
How is stabilization applied to a radar picture?
In general the same stabilization is applied to the radar picture presentation and to the true vectors, i.e. either both are sea-stabilized or both are ground-stabilized. Thus in general, where automatic ground-stabilization is selected, true vectors will indicate the ground tracks of targets and not their headings.
Why do I need a ground stabilization display?
Well ground stabilization display may and will give a misleading idea about a target/ship in coastal areas, involving tidal currents. GPS speed in general gives ground speed, and there lies the necessity of having a speed log, which can give input to the Radar of the set and drift experienced by own vessel.
Why are true vectors important in ground stabilization?
Thus in general, where automatic ground-stabilization is selected, true vectors will indicate the ground tracks of targets and not their headings. Failure to appreciate this can render the presentation dangerously misleading if it is mistakenly used in the planning of collision avoidance strategy.
When to use own vessel in ground stabilization?
The above is a case of an own vessel observing another target in an area where the current is a factor. If ground stabilization is used, then the own vessel course is taken by the ARPA as 000 deg. And speed of 12k, however due to the current the actual vector of own vessel is Co. 018 deg. and spd. 12.5k.