EFFECTS OF WEATHER ON PICTURE COMPLILATION Flashcards
List the 3 types of weather clutter?
SEA RETURNS
PRECIPITATION
ABNORMAL REFRACTION
With regards to sea returns what factors determine the amount of clutter?
SEA STATE
SURFACE WIND
AERIAL HEIGHT
WAVELENGTH
What are the effects of sea returns?
LOSS OF CLOSE IN CONTACTS
SMALL CONTACTS MAY BE LOST
MINIMUM RANGE INCREASED
What effect does Fog/Mist have on RADAR?
Little or no effect on operating frequencies
What are the effects on Precipitation on RADIO/RADAR waves?
SCATTERING
ABSORPTION
RE-RADIATION
What effects does precipitation have on picture compilation?
SCREEN TARGETS
BLOCK ECHOES
LOSS OF MAX DETECTION
What is REFRACTION?
This is the bending of an array of energy as it passes from one medium to a more/less dense medium it is dependent on.
List the 3 conditions REFRACTION dependent on?
TEMPERATURE
PRESSURE
HUMIDITY
What effect does SUPER REFRACTION have on RADAR waves?
Significant bending of the RADAR downwards towards the sea
What are the operational effects of SUPER REFRACTION?
- INCREASED SURFACE DIRECTION RANGES
- INCREASE IN UHF RADIO COMMUNICATIONS
- INCREASE OF LOW AIR CLUTTER
- HEIGHT ESTIMATION SUSPECT
What are the operational effects of SUB REFRACTION?
- LOSS OF SURFACE DETECTION RANGES
- LOSS OF LOW AIR COVER
- HEIGHT ESTIMATION SUSPECT
What is DUCTING?
Abnormal variation in temperature pressure or humidity may result in the formation of a duct
What are the operational effects of DUCTING?
✅POSSIBLE ANSWERS✅
- INCREASED INDIA BAND CONTACTS
- INCREASED AIS DATA
- LACK OF AIR CONTACTS ABOVE THE DUCT
Name the 2 types of MUTUAL INTERFERENCE?
ACCIDENTAL 😅
INTENTIONAL/JAMMING 😈
How does ACCIDENTAL MUTAL INTERFERENCE occur? 😅
This is caused by other equipment radiating on a similar frequency which may degrade or confuse the picture
