RWS and radar coast mode question
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from the -34:
how does coast work in STT vs SAM? the manual says on STT mechanization:“Currently in BMS a track target will flash after one failed update but is not dropped until 13 seconds have elapsed; the COAST indication happens only 5 seconds before the track is dropped. So there is a period of around 8 seconds when the TD box and TTL in the HUD/HMCS isn’t dashed.”
After one failed update sounds like its talking about SAM mode when the antenna trains back towards the target and updates its position. Isn’t STT basically one long “update” in real time?
There’s this from the internet (one of the real life manuals?):
Also wondering if someone can clarify this from the BMS manual regarding the target’s radar return degrading:
“A radar track will start degrading if the radar doesn’t pick it up again within a reasonable (pattern dependent) time frame. If the radar has not detected the tracked target lately (for example in the last 5 paints where the beam passes over the target aircraft but doesn’t get a strong enough return) and the radar is coasting (4 seconds since the last actual hit) extrapolation continues. After the coast time the symbol will flash to indicate imminent loss of track status; sometimes you won’t see this depending on
where the target was in the scan pattern. In this situation the track will disappear unless you get a paint and detection almost immediately.”–Why wouldn’t the radar enter coast for a full 5 seconds simply because of where the beam was in the pattern?