reply to post by Thermo Klein
HOW can HAARP direct it's beam?
I noticed alot of talking on bending and different paths.
DEVIATIVE
Type of ABSORPTION occurring wherever the ray path bends
significantly such as near the top of a ray trajectory. Deviative absorption
predominately occurs near a layer critical frequency...........................
MULTIPATH
Term applied to propagation conditions where a signal may arrive at a
receiving location through more than one geometric path.......................
CHORDAL MODE
An ionospheric propagation mode characterized by two successive
Earthward reflections from an ionized layer without an intermediate
ground reflection, usually caused by an ionospheric tilt........
GREAT CIRCLE
The intersection of the Earth's surface with a plane containing the center
of the Earth and two points on its surface. A great circle is the shortest
distance between those two points. Radio waves usually (but not always)
follow great circle paths from transmitter to receiver.
www.haarp.alaska.edu...
It looks like they are focussing the beam in the lower right hand corner. Bouncing it off of everything.
Some Performance Parameters for the HAARP Antenna System
TextSize...... 1040 feet X 1280 feet
Area...... 30.6 acres
Directivity.....
3 Mhz ....100 (20 dB)
10 Mhz..... 1000 (30 dB)
Main Lobe Beamwidth
3 Mhz..... 15 deg
10 Mhz..... 5 deg
Operating Frequency... 2.8 - 10 Mhz
Pointing Angle ......Within 30 degrees of Vertical
Reposition Time...... 15 deg. within 15 microseconds
Polarization....... Left/Right Hand Circular, Linear
Sidelobe Control...... Full - By Element Tapering
Maximum VSWR...... 3.2:1
www.haarp.alaska.edu...
I noticed that there is nothing in the directivity section. It is blank.
What I did notice is, is the POINTING ANGLE. It says within 30 degrees of vertical.
If it says within, does this mean that it can change? Whenever I read "within", it is not an exact number or range, this is also known as a tolerance.
Also, why is there a reposition time? Would this mean that they have to reposition the beam, or array?
Help me out here folks. I see not that much information on this thread. Just alot of speculation.
ETA: Also notice.
Sidelobe Control........ Full - By Element Tapering
www.haarp.alaska.edu...
Here is some information on sidelobe.
In antenna engineering, side lobes or sidelobes are the lobes of the far field radiation pattern that are not the main beam, where the terms
"beam" and "lobe" are synonyms.
The radiation pattern of most antennas shows a pattern of "lobes" at various angles, directions where the radiated signal strength reaches a maximum,
separated by "nulls", angles at which the radiation falls to zero. In a directional antenna in which the objective is to emit the radio waves in one
direction, the lobe in that direction is designed to be bigger than the others; this is the "main lobe". The other lobes are called "side lobes", and
usually represent unwanted radiation in undesired directions. The side lobe in the opposite direction (180°) from the main lobe is called the "back
lobe". In transmitting antennas, excessive side lobe radiation wastes energy and may cause interference to other equipment. In receiving antennas,
side lobes may pick up interfering signals, and increase the noise level in the receiver..
en.wikipedia.org...
So does this mean that with different side lobe locations and angles they can scatter or point the beam in different directions??
I would like to see if annone can answer these questions. I am finding alot of information about bouncing, scattering, and pointing beams. How come
people think that this is not possible?

edit on 16-6-2011 by liejunkie01 because: (no reason given)