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Heppner, J. P.

Publications and source records attributed to Heppner, J. P..

87 records · Page 5
All sourcesNASA NTRSDOE OSTI
NASA NTRS1965

The earth's magnetic field.

Earth magnetic field including mathematical descriptions, origin, daily magnetic variations, polar and auroral disturbances, magnetic storms, activity indices and whistlers

MAGNETIC VARIATION↗
NASA NTRS1963

The world magnetic survey.

Polar orbiting geophysical observatory and surface magnetic field analyses considered in making a world magnetic survey

MAGNETIC SURVEY↗
NASA NTRS1963

The World Magnetic Survey

The mathematical and graphical description of the earth's main field has been, and is, a "data limited" problem. The World Magnetic Survey (WMS) is an endeavor to minimize this limitation by rapidly and comprehensively blanketing the earth with magnetic field measurements. Satellite surveys, which will play a key role in the W MS, are the principal topic of this paper. Existing magnetic field descriptions, the expected results from new surveys, and the methods of obtaining these results with the POGO satellite are emphasized. It is anticipated on the basis of extrapolation from Vanguard 3 results and other considerations that a factor of 10 improvement will be obtained. This means that the average errors of 1 to 3 percent now present in field charts and spherical harmonic descriptions should be reduced to 0.1 to 0.3 percent as a result of the survey.

MATHEMATICS↗
NASA NTRS1963

EXPLORER 10 MAGNETIC FIELD MEASUREMENTS

Magnetic-field and plasma-flux measurements by explorer 10 in traversing the geomagnetic field and extending into the interplanetary medium

GEOMAGNETIC FIELD↗
NASA NTRS1963

EXPLORER X MAGNETIC FIELD RESULTS

Magnetic field and plasma flux measurements by explorer x in traversing the geomagnetic field and extending into the interplanetary medium

GEOMAGNETIC FIELD↗
NASA NTRS1962

GEOMAGNETISM

Geomagnetism - role of gravitational and magnetic fields in space and earth core currents - use of satellites in electromagnetic mapping

EARTH CORE↗
NASA NTRS1960

The Vector Field Proton Magnetometer for IGY Satellite Ground Stations

The application of homogeneous-bias fields to a proton precessional magnetometer allows the measurement of the vector field by measuring the absolute scalar field F, declination variations (Delta)D, and inclination variations (Delta)I. The absolute scalar field can be measured to an accuracy of +/- 1 gamma and absolute declination and inclination to an accuracy of +/- 2 minutes. This paper describes a vector proton magnetometer that has been in operation at nine Minitrack stations since the spring of 1958.

Shapiro, I. R.↗
NASA NTRS1960

Project Vanguard Magnetic-Field Instrumentation and Measurements

The Vanguard III Satellite, 1959 Eta, placed in orbit on September 18, 1959, contained a proton precessional magnetometer for magnetic-field studies of exceptional accuracy. Throughout the 85 days of battery life, the instrumentation functioned according to plan. Measurements of the absolute total field were obtained in the meridian belts of Minitrack stations at altitudes 510 to 3750 kilometers and at latitudes +/- 33.4 degrees. Surface magnetic observatories were operated at eight of the Minitrack stations to furnish correlative information. This paper reviews briefly the instrumentation employed in these experiments, and the data collection and reduction procedures. Emphasis is given to results from a preliminary analysis. Specifically, this analysis bears on the accuracy of computed fields, the stability of the earth's field in space, the Capetown anomaly, and magnetic-storm effects.

Heppner, J. P.↗