20170215, updated 20210128
MADAR I & II used a magnet variometer to detect UFOs. MADAR-III dataProbe uses a magnetometer to do this, but also collects data on compass deviations and changes in barometric pressure. The The original MADAR-II was a one-site operation at Mt. Vernon, Indiana. MADAR-III is a collection of over a hundred dataProbes located in the United States and several foreign countries.
In June of 1960 NICAP originally listed 81 primary E-M cases. NICAP published "The UFO Evidence" in 1964 and listed 25 additional incidents.
Researcher Eric Herr
concentrated his efforts toward compass needle
incidents. Working together we located about 150
reports. Using that list we were able to locate
the reports, many in much more detail.
In 1981 Mark
Rodeghier (CUFOS) published UFO Reports
Involving Vehicle Interference and listed
Dr. Richard Haines
catalogued 185 E-M cases involving aircraft,
alone. In this 1992 paper he listed 56.
The NICAP team has researched the following E-M cases on the NICAP site.
E-M Cases on the NICAP site
Besides the obvious choice where MADAR displays and records compass heading in degrees (and therefore any changes), it displays and records readings of the local geomagnetic field in milligaus, plus barometric pressure; all time stamped in Universal Time Code. The recordings are in the form of data sent to one of the MADAR Servers at a rate of one line of data per minute. When triggered by a specific change in the field the device goes into alert mode at a rate 60 times faster until the alert is over.
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MADAR Operations Center