|Rob / ZS1SA opens the meeting and reports on the recent Committee Meeting|
|Stephen Paine of the UCT Radar Remote Sensing Group started the lecture|
|Skippy Burger / ZS1SKP, who is involved with HF Surface Wave Radar|
|Form follows function: Some examples of different Radar antenna applications|
|Congested international aircraft flight paths require radar for ATC|
|The airways congestion in Europe is even more severe!|
|A basic block diagram of a Radar installation|
|The RCS (Radar Cross Section) determines how much energy is reflected from the target|
|An illustration (on right) of how Stealth Radar deflection reduces and redirects|
reflected Radar energy. The civilian aircraft (on left) produces a far greater
|The Doppler effect plays a huge role in Radar sensing technology|
|The difference in the phase of the received signal can determine its incoming angle|
|NeXtRAD, a netted coastal Radar system being used to detect|
small vessels in rough seas.
|Sydney Harbour Bridge. This image could have been obtained|
at midnight, because it is a Synthetic Aperture Radar image.
|Surface Wave Radar can be used to detect the direction of ocean currents|
and their responses to changing weather conditions in real time.
The SA Navy would also like to see what is going on off our shore line.
|A three-node Surface Wave Radar system|
|Block diagram of a single Surface Wave Radar node.|
|The formidable Red Pitaya digital back-end; the core of the Surface Wave Radar node.|
|The Biconic radar antenna. You too can have one in your back yard!|
|A BiStatic Passive Radar Receiver uses two antennae: One for the reference signal and|
the other for the actual tracked echo from the target. The more Surveillance antennae used,
the greater the accuracy of the system.
|Front of the multi-tiered Passive Radar Receiver.|
|The symmetrical signal paths of the Reference and Surveillance channels|
|The two antennae of the Passive Radar Receiver on top of the RRSG building at UCT|
|Input signal of the received signal before filtering|
|All the clutter removed after filtering and amplification, leaving the pure signal|
|The formidable Ettus USRP N210 Software Defined Radio,|
the core of the Passive Radar Receiver
|Approaching and departing aircraft can be tracked as they enter the|
Cape Peninsula region
|Various radar plot maps show the position of an aircraft|
|Another plot map with an aircraft position (highlighted)|
|After the meeting begins the bunfight!|
|Skippy / ZS1SKP and John / ZS1AGH|
|Barry / ZS1FJ peruses some radio swops brought by Ian / ZS1SX|
|Among the swops are some battery charger units from Mike / ZS1FP|
|Frank / ZS1CM and Stephen. In the background is Justin, also involved at UCT's RRSG|
|More swops! This fine dual dipole galvanised SWL antenna is available|
from Mike / ZS1PE, for a very reasonable price!