reply to post by observe50
Completely making stuff up, again....pulling it out of your nether regions???
....you will notice that normally the air traffic is always within the same path's and on spray days totally different.
Nope. Since, when talking about CONtrails, we are referring to the airplanes at altitudes of 25,000 feet and ABOVE....this means they are in cruise
flight, or just beginning a descent (for a destination over 100 miles away) ...or, just about finished climbing to a cruise altitude (because they
took off about 60 - 70 miles away from where you see them overhead). Typical final cruise altitudes in the range of 31,000 to 39,000 generally.
At those altitudes, the routes are just about the same, day in, and day out.....
SO.....although this is
You might even notice that your airport changes the traffic (take off and landing a wee bit differently...
...you apparently don't understand the process, and the why
. Firstly, though....it has NO relevance
direction the airports are using for takeoffs/landings.
Secondly, the only reason that drives the changes in runway direction is wind direction. In some specific airport situations, the direction of
landing in particular might be dictated by the types of Instrument Landing facilities available. This will be in the case of bad weather, low
ceilings and visibility (fog) and otherwise crappy weather....when you won't see any CONtrails anyway!!!
You don't have to take MY word for it, about the usual routes, between cities. The flight plans of every airplane on an IFR flight in the USA are
available, if you just bother to look.
For instance, follow this link:
You can either input a specific flight number, or as I did, click on "Forgot Flight Number", and input two cities, departure/destination. Here, I
used KEWR/KIAH (Newark, NJ and Houston, TX).
As you see, there is a list of many flights, to include those from "today" and "yesterday" (that range is selectable, too)...
Click on the flights, for their info. For example, Flight 481, a B-777, on 4th March, 2011:
- Route: BIGGY J75 GVE J37 SJI WOLDE3 (Decode)
- Date: Friday, March 04 2011
- Duration: 3 hours 33 minutes
In the "Route" line, that decodes as a waypoint (an "intersection") near the airport (EWR), which is located along a Jet Airway (J-75). That
Airway continues for a distance, until it reaches a VOR (GVE), which is the "Gordonsville" VOR, in western Virginia. Then, it branches to J-37, to
another VOR (there are many others, located on same Jet Airway...read the "decode") (SJI). SJI is "Semmes", near Mobile, AL. From there is a
published Arrival Procedure for the routing and descent info into IAH.
It is really pretty simple, once you learn how to read it. (AND, after years and years of practice!!).
You can see all the charts, the "High Enroute" charts, at www.skyvector.com...
IN addition, loads of info at www.airnav.com...
Airports, Navaids, and Waypoints (or, "fixes").
Have a look, at either that same flight, over a large range of dates....or, look at other flights, same city pairs, different times, different days.
You will see the routings are almost always nearly identical. Most changes will be seen on East/West bound cross-country flights, due to the strong
winds usually encountered in those directions....Routings more North/South sometimes, in order to minimize impact, or take advantage, depending.....