Results 251 to 260 of about 5,511 (281)

An ultra stable optical bench for the magnetic survey satellite

Acta Astronautica, 1980
Abstract An optical bench has been designed and built that must hold the alignment of five optical elements to deflections of 1–2 arc s during orbital operation. In addition, it must suffer no alignment changes during the launch and prestabilization phase of the mission.
Clarence A. Wingate   +2 more
openaire   +1 more source

MAGSAT--A new satellite to survey the earth's magnetic field

IEEE Transactions on Magnetics, 1980
The MAGSAT satellite was launched on October 30, 1979 into a sun-synchronous dawn-dusk orbit, of 97° inclination, 350 km perigee, and 550 km apogee. It contains a precision vector magnetometer and a cesium-vapor scalar magnetometer at the end of a 6m long graphite epoxy scissors boom. The magnetometers are accurate to 2γ.
F. Mobley   +3 more
openaire   +1 more source

A survey on active magnetic attitude control algorithms for small satellites

Progress in Aerospace Sciences, 2019
Abstract Control algorithms for the active magnetic attitude control systems are covered in the survey. Three different situations in the magnetic system implementation are considered. First, angular velocity damping is covered. Second part is devoted to the combined operation of the active magnetic system with other actuators and with the help of ...
M. Yu. Ovchinnikov, D.S. Roldugin
openaire   +1 more source

Detection of fast secular variations based on the data of satellite magnetic surveys

Geomagnetism and Aeronomy, 2010
The usage of only the vector satellite survey data made it possible to detect rapidly developing anomalies of the secular variations with the foci in central Asia and Indian Ocean. It has been indicated that the field at the foci increased by several hundred nanoteslas for eight years.
V. P. Golovkov   +2 more
openaire   +1 more source

CHAMP Enhances Utility of Satellite Magnetic Observations to Augment Near-Surface Magnetic Survey Coverage

2003
Regional to continental scale magnetic anomaly maps are becoming increasingly available from airborne, shipborne, and terrestrial surveys. Satellite data can be used to help fill the coverage gaps in regional compilations of these near-surface surveys. For the near-surface Antarctic magnetic anomaly map being produced by the Antarctic Digital Magnetic ...
Hyung Rae Kim   +3 more
openaire   +1 more source

An integrated approach to surveying an Early Agricultural period landscape: Magnetic gradiometry and satellite imagery at La Playa, Sonora, Mexico

Journal of Archaeological Science: Reports, 2017
Abstract La Playa (SON F:10:3) in Sonora, Mexico is the single largest Early Agricultural period (2100 BCE–50 CE) site in the Greater Southwest. Modern erosion is rapidly destroying large portions of the archaeological site, highlighting the urgent need for documentation of threatened archaeological structures and features.
openaire   +1 more source

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