Deja Vu AscendancyChapter 340 Radio Blobs
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Deja Vu AscendancyChapter 339: Radar Blobs free porn video
Tuesday, April 17, 2007 (Continued)
After it was dark, I flew to collect my A-man suit, putting it on then my black clothes back on top. I flew to the Cascades, then south down among the ridges and trees.
After a couple of hundred miles, I diverted toward some lights to find a spare computer or two and started researching radar detection limits. Five minutes later, I was VERY worried!
I'd assumed that radars didn't work unless their targets contained metal. When the army guys had described our home system to us, that's what they'd said. I knew there were weather radars that could pick up storms, but I'd presumed they worked because of the sheer mass of water involved. Each drop would only reflect a tiny amount of the radar beam, but many cubic miles of raindrops added up to a huge amount of reflected beam. I was a lot smaller than "many cubic miles", so I hadn't worried about it.
I should've worried! There are several different types of radars, some of which are capable of phenomenal feats of detection. I could pick up a phone and rent a radar unit on a trailer that was capable of tracking the flight of an individual moth! If the public could rent mobile radars that could do that, God knows what the military radars were capable of! (And God knows why people would be that interested in a moth.)
Further reading eased my minds somewhat. The good news was that search radars capable of that much discrimination had extremely short ranges. They'd lose track of their moth if it went much more than a mile away from the radar station. There were still some problems though:
I have a reflective area about a thousand times larger than a moth, and I'm denser so presumably more reflective. Call it 2,000 times worse. That extends the detection range by the fourth root of 2,000, about 6.7 times, giving the stations about an 8-mile radius. (Fourth root because it's an inverse square law going out, and again when coming back.)
The military could pump more power into the transmitter. Ten times more power would give the station an 80-mile radius for detecting me.
The military wouldn't need to track me continuously. Over the course of several of my flights, they'd be able to get data from whenever I flew over any of their radars. Eventually they have enough data to take some guesses about where I was coming from. They could move several mobile stations into the state, and then into the general area, and then into our backyard.
Very worried, I kept reading. The next snippet I read was a comment about identifying bird species. There are radars that use the Doppler Effect (called "Doppler Radars") that can tell from the frequency change in the returned signal how fast the target is coming toward, or going away from, the radar station. Some of them have enough discrimination to identify the species of individual birds by how fast their wings are flapping! That's a scary amount of discrimination and precision.
Not so bad was that the military radars are generally tuned to frequencies which give a long range. Those frequencies bounce off metal well, but not off flesh. Airfields which are having bird strike problems often have to set up dedicated bird radars to detect flesh. They're very short range, and I made a strong mental note to approach all military airfields at very low altitude in the future, preferably on foot or bicycle. I'd been lucky that I'd biked to Andrews AFB. I had no idea whether Andrews AFB had bird problems, but they had the presidential jets so it was hard to imagine they didn't have every possible precautionary technology.
Meteorological radar is tuned to a frequency which bounces off water well, and Avian radar to a frequency that bounces off flesh well. It turns out that those two frequencies are effectively the same because flesh is mostly water, and radar readers (whatever that job is called) often have trouble differentiating a rainstorm from a flock of birds. That means I was at risk of being detected by bird watchers as well as by meteorological stations.
The next item I read was very bad. It was a meteorological radar coverage map for the continental USA, which showed that the land area covered is greater than 95%. There are stations dotted in a fairly regular row and column pattern across the entire country, so their range circles touch each other, and there are only a few corners that aren't covered.
Then I realized that the range circles were for detecting cubic miles of rain. I was a lot denser than rain, but tiny in comparison. The meteorological radar stations were sited efficiently, so their ranges only just overlapped. That meant that if their detection range for me was one-tenth of a rainstorm, then their coverage area dropped from nearly 100% to nearly 1%. That was still a worry though, because if they got enough samples they could draw some inferences from my comings and goings.
I imagined that the meteorologists didn't routinely share their data with the military. That might change now that there was an angel flying around, and they might even hand over their recordings. I had no idea whether, or for how long, meteorological radar stations stored their old data. That was a worry, but it offered a hope that they didn't keep it long. Maybe occasional radar glimpses of Majestic Countdown's many dozens of flights would've been lost by now.
A good piece of information was that meteorological radar looks upward. It's not interested in low-level effects, so flying low was my new altitude-of-choice.
Unfortunately, all the comments just above are only about meteorological radar. That and avian radar are mentioned extensively on the internet, but the performance of military radar is hardly mentioned at all so I had to guess about that. If the best publicly available systems could track individual moths, the military ones would obviously be easily capable of tracking me. I hoped it was not a question of capability, but of intent. I guessed that the military hadn't previously been interested in flying flesh (whether birds, moths, bats, or undiscovered angels), but they would be VERY interested now.
I made some mental notes: fly as little as possible, fly very low (underwater would be ideal), make many random direction changes, and worry a lot more about the radars on military aircraft.
The last point was a particularly serious one. An AWACS plane had so much radar gear on it that surely one of them could be tuned to the right frequencies to track me easily. It could follow me wherever I went, regardless of how much zigzagging I did. It could even be used to provide targeting information to a missile fired from miles away. If I saw an AWACS, I'd have to take extreme measures, either defensive or offensive.
Then I thought of something even worse. The Air Force has those very small, high-altitude, unmanned drones. They could mount a suitable radar on one of them and follow me with it, and I wouldn't have a clue. Even with a max-sized sight blob, I wouldn't see one of those little things high above me. There could be one over me now!
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