"HAARP is so much weaker than these naturally occurring processes that it is incapable of producing the type of optical display observed during an aurora.
However, weak and repeatable optical emissions have been observed using HAARP (and reported in the scientific literature) using very sensitive cameras."
Heater-induced artificial airglow observations from a recent campaign at the HAARP facility
Publication: 34th COSPAR Scientific Assembly,
The Second World Space Congress,
held 10-19 October, 2002 in Houston, TX, USA
An artificial airglow campaign was conducted from January 31 to February 19, 2002 at the High Frequency Active Auroral Program (HAARP) in Gakona AK.
[An] artificial airglow was observed on thirteen nights during the campaign.
The campaign was a collaborative effort with participating instruments from a number of institutions.
Three cameras were located at the HAARP facility: an all-sky imager, a 60 degree field of view camera, and a telescopic imager.
Two cameras were located off-site for side view imaging- one at Poker Flat Research Station, and the other alternating between Nenana AK and HIPAS. An SEE receiver was operated in Gakona and the Kodiak SuperDARN radar was run in a dedicated mode for part of the campaign.
In addition data was gathered throughout the campaign by the HAARP diagnostic instruments including a riometer, magnetometer, digisonde, ELF receiver, and TEC tomographic system. (image at right example of HAARP riometer data)
Several preliminary results have emerged from observations during the campaign.
Bright 630nm (several hundred Rayleighs) and 557.7nm (over 50R) airglow were observed simultaneously during F-layer heating.
A dramatic enhancement in airglow brightness was observed when the HAARP heater beam was aimed along the magnetic field lines (15 degrees from vertical).