Results
Prediction of anomalous cosmic ray intensities near Earth
The figure illustrates many of the important features of the solar modulation of anomalous cosmic rays (ACRs) and also gives us a forecast for the coming years. Panel (a) shows the intensity of ACR O at 1 AU as measured by a variety of observers over the last 30 years. The SAMPEX measurements are the […]
(Read more»)Space weather May 98
During May there were several spacecraft anomalies: Equator-S stopped transmitting data on May 1 Polar suffered an anomaly May 6 that stopped its processor PanAmSat’s Galaxy-4 failed May 19, disrupting paging and other communications services in the U.S. The Polar spacecraft anomaly coincided with the rise phase of an solar energetic particle event on May […]
(Read more»)NOy: solar coupling
A significant coupling has been proposed to exist between solar activity, energetic electron precipitation (EEP) from the magnetosphere into the atmosphere followed by NOy formation with its transport to the stratosphere possibly altering stratospheric O3. The verification of this solar-terrestrial coupling requires three essential findings. (1) Show that precipitating electrons respond to solar forcing, in […]
(Read more»)Long term variation in the flux of low altitude quasi-trapped equatorial ions
The LICA ion spectrometer on SAMPEX routinely detects quasi-trapped protons near the magnetic equator. Such low-altitude, equatorial ions first were observed by Moritz (1972) and Hovestadt et al. (1972) with instruments on the Azur satellite. The ions typically have pitch angles near 90 degrees, because more field-aligned ions are rapidly lost to collisions with the […]
(Read more»)Global coherence of electron enhancements in the magnetosphere
Several magnetic cloud/CME events have been observed during the 1997-98 time period, as we approach the maximum of the next solar cycle. Multiple spacecraft have observed for the first time the evolution of these events from their origin to passage over the magnetosphere. We have studied the magnetospheric outer zone energetic electron response to these […]
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