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The data is processed from a radar feed, which gives a fairly accurate account of aircraft position and altitude. However, radar data can contain anomalies such as spikes and jags and reflections, which have been corrected as much as possible before being displayed on your screen. Nevertheless, if you see occasional odd jags in the flight tracks, these are likely radar anomalies and NOT true depictions of the flight track. These anomalies are not common, and will mostly likely occur when the flights are nearer to the ground, where radar data can more easily reflect off of nearby buildings.
GREEN Aircraft are those that have been detected as departing from an airport (i.e., their altitude is rising instead of falling).
RED Aircraft are those that have been detected as arriving at an airport (i.e., their altitude is falling instead of rising).
WHITE Aircraft are "overflights", i.e., aircraft that have been detected as flying over the area, not landing or departing. They usually fly at a significantly higher altitude than the green and red flights.
BLACK Aircraft are those identified as "General Aviation" aircraft. These are identified based on a standard general aviation "transponder" code. They are usually smaller aircraft, not associated with any airline. No flight information (airline, aircraft, etc.) is known for general aviation flights.
ORANGE Aircraft are those that cannot be identified as being an arrival, departure, overflight, general aviation, or helicopter. Often these are general aviation aircraft, and in some cases the altitude is not reported and thus its flight type cannot be determined.
Helicopters on the display are those that have been detected as being helicopters. There is no particular information from the radar that identifies helicopter vs. non-helicopter, so the flight pattern is analyzed (based on its speed, altitude, turning pattern) and the flight is "detected" as being a helicopter based on these rules. For this reason, you may sometimes see orange aircraft "turn into" helicopters and vice versa, as the program tries its best to determine the type of flight. Since helicopters can indeed fly in a pattern similar to a small general aviation aircraft, some black/green/red/orange aircraft on the display may indeed be helicopters that have not been detected as such.
Originally posted by Palasheea
It's a HELICOPTER internos! Darn'it
Here's what they look like:
Please oh please... anyone have an Advil available??
Originally posted by Vasa Croe
There are also a number of other places a helicopter could have come from though....this is a marina with quite a few LARGE boats in it as evidenced by Google Earth. There are also quite a few hospitals in the area with helipads.
Thanks for the photos and keep up the great photography work!
Originally posted by Palasheea
Check out this news site!
It shows photographs of a UFO seen over S.F back in July of this year and the images are STUNNING!
Below is a section of an interview of the person who captured those photo's seen on the above link and it's amazing that considering the size and how clear the UFO is seen in those photo's, he didn't see anything up there at the time when he took them!
An Interview with The Photographer
TB: Did you see anything at the time the shots were taken, or did you only see them when you looked at the shots later?
I noticed nothing that I thought was abnormal. I did, however, take note of very strong winds. Keep in mind I had just driven straight across the country for 3 days from Amherst, NY. So nothing would have seemed too out-of-the ordinary. I only noticed the objects in the pictures upon reviewing my 2,000 or so photographs from the trip at work one week and several days later. The lighting that can be seen on the water, was certainly not visible to me at my time on the dock. I was peering out over the water, shooting direct shots of the landscape just beyond the water. I was basically staring at the water during the time I took these shots. None of the objects or lights in the picture were visible to me. Nothing was of any alarm.
TB: Was there any noise?
Any noise would have been obscured by wind. We were on the bay and it was a very windy night.
TB: How close was it?
I knew of no object at time the photographs were taken.
replaced quote with 'ex' tags for external material
[edit on 15/11/07 by masqua]
[edit on 15-11-2007 by Palasheea]
Originally posted by laurenrose
reply to post by Dallas
I double checked with grant and the pictures were taken on rapid fire: or rather automatically by the camera in sucession: so the estimated 30 seconds suggested before by wben is inaccurate.
And this explains also why there are three photos as opposed to one.