Midlatitude Pi2 pulsations: AFGL and ISEE magnetometer observations correlated

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6212915

Hughes, W J; Singer, H J; Maynard, N C

The ISEE observations of the pi2 magnetic pulsations occuring substorm onset in the inner magnetosphere are discussed. One of these events which was also detected as a pi2 event by the AFGL midlatitude magnetometers is considered. The event occurred when the foot of the ISEE field line was over North America. The ground and satellite signals are remarkably similar: they start and stop at the same time, have the same period and can be correlated cycle by cycle. The waves are detected in the electric field data from ISEE 1 and in the magnetic field data from both ISEE 1 and ISEE 2. Calculation of the Poynting vector at ISEE 1 shows that the energy flowed mainly westward, but that there was also a component towards the nearer (southern) ionospheric foot of the field line. The phases between the various field components measured by ISEE 1 and 2 indicate that this is a standing hydromagnetic oscillation.

• Research Organization: National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
• OSTI ID: 6212915
• Report Number(s): N-8228232; NASA-TM-84763
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATIONS
EARTH ATMOSPHERE
ELECTRIC FIELDS
GEOMAGNETIC FIELD
HYDROMAGNETIC WAVES
MAGNETIC FIELDS
MAGNETIC STORMS
MAGNETOMETERS
MAGNETOSPHERE
MEASURING INSTRUMENTS
MONITORING
POYNTING THEOREM
STANDING WAVES
SUDDEN COMMENCEMENTS