Events

The following data were acquired by the Solar Radio Burst Locator (SRBL) at Caltech's Owens Valley Radio Observatory (OVRO), near Bishop, California. That instrument continuously monitors the microwave output of our sun, over the entire solar disk. On 10 June 2002, a partial eclipse began just after 5 PM Pacific Daylight Time, covering roughly half of the sun at maximum, around 6:20 PM. The plot below shows the relative dip in intensity observed within three frequency ranges. To prepare this plot, averages were first computed on 9 and 10 June within the 2-4, 4-8, and 8-16 GHz bands. Then the ratio of observations on 10 June versus those measured on 9 June was formed, and normalized. Superimposed upon our data are fluxes calculated from a simple model of this eclipse. The steep drop at 5:28, and rise at 6:34, coincided with the occultation of region 9987, which must have contributed a significant fraction of the total solar flux.

The SRBL prototype at OVRO is owned and operated by New Jersey Institute of Technology.
website: http://www.ovsa.njit.edu/srbl
contact: dgary@njit.edu