请问viper的coast模式是什么原来（好像是这么拼，要是拼错了，还望大家海涵）

wangdashuai

在跟踪的迎头目标调转方向逃跑时由于敌我接近率迅速下降，雷达进入了coast模式，在这个模式下不能提供接近率。但是还是可以提个目标的方位与距离信息，这是为什么？viper的雷达不是多普勒体制吗？没有多普勒频移还怎么跟踪目标呢？求技术帝解答！

Ragnarok

没仔细看过，不过相对速度不可能绝对为0，coast是信息减弱的表现。

foxwxl

技术解答不了…我只知道COAS一旦出现目标即将脱锁，或者说此时雷达已经失去了对目标的稳定跟踪，目前的位置只是FCC推断预测的位置。一定时限内，目标出现，则恢复跟踪，不过目标位置多半会跳一下，刚刚只是预测结果~~一定时间内无法恢复跟踪，则正式脱锁~~

Ragnarok

When a target approaches the beam aspect, its Doppler frequency becomes coincident with the main
radar beam clutter (Doppler notch). If the main beam clutter is especially strong, the radar can lose target contact. In a strong clutter environment, if radar contact is lost the radar will attempt to “coast” (COAST Mode) the tracked target through the notch as it approaches the beam aspect. As the target emerges from the main beam clutter, the radar will use RWS mode for 4 seconds in an attempt to acquire the target. If successful the radar returns to STT. If unsuccessful, the radar transitions to a 4 bar +/- 10 deg reacquisition search pattern before returning to the last selected search mode.

Verb

coast (third-person singular simple present coasts, present participle coasting, simple past and past participle coasted)
1.(intransitive) To glide along without adding energy. When I ran out of gas, fortunately I managed to coast into a nearby gas station.
2.(intransitive, nautical) To sail along a coast
3.Applied to human behavior, to make a minimal effort, to continue to do something in a routine way. This implies lack of initiative and effort.

LJQC

简单地说来，你的雷达在跟踪目标的时候由于各种杂波而把它丢了，那么雷达就会进入COAST Mode，当目标重新出现时它会帮你自动锁上~~~~详见楼上引用的M1手册里的原话

Ragnarok

LJQC 发表于 2012-1-10 15:51
简单地说来，你的雷达在跟踪目标的时候由于各种杂波而把它丢了，那么雷达就会进入COAST Mode，当目标重新出 ...

不好意思，同时引用了同一段。

LJQC

Ragnarok 发表于 2012-1-10 15:59
不好意思，同时引用了同一段。

看来思路一样啊～～有问题，找手册

overstrain

哈哈，还是手册党最有说话权啊~

Ragnarok

笑天下?

wangdashuai

Ragnarok 发表于 2012-1-10 17:27
笑天下?

yeah,it is me

rois

Coast类似于TGP里面的computed rate track, 其实雷达已经脱锁, 只不过根据目标之前的运动参数在猜测目标当前的位置, 当目标重新出现后可以更快地捕获.

overstrain

跟贴学习下~