Rocket measurements of the magnetic field above New Mexico

Absolute value, total intensity measurements of the magnetic field above Holloman Missile Development Center, New Mexico, were obtained to an altitude of 236 km with a proton precession magnetometer aboard an Aerobee-Hi rocket. The flight took place on a magnetically quiet day during the normal midmorning variation. Comparison of the observed values with those predicted by spherical harmonic coefficients yields an anomaly of the order of 80 γ during ascent between the altitudes of 85 and 165 km, whereas no comparable effect was found for the descent portion of the flight down to 146 km.