The improved ARTEMIS IV multichannel solar radio spectrograph of the University of Athens

Abstract

We present the improved solar radio spectrograph of the University of Athens operating at the Thermopylae Satellite Telecommunication Station. Observations now cover the frequency range from 20 to 650 MHz. The spectrograph has a 7-meter moving parabola fed by a log-periodic antenna for 100 650 MHz and a stationary inverted V fat dipole antenna for the 20 100 MHz range. Two receivers are operating in parallel, one swept frequency for the whole range (10 spectrums/sec, 630 channels/spectrum) and one acousto-optical receiver for the range 270 to 450 MHz (100 spectrums/sec, 128 channels/spectrum). The data acquisition system consists of two PCs (equipped with 12 bit, 225 ksamples/sec ADC, one for each receiver). Sensitivity is about 3 SFU and 30 SFU in the 20 100 MHz and 100 650 MHz range respectively. The daily operation is fully automated: receiving universal time from a GPS, pointing the antenna to the sun, system calibration, starting and stopping the observations at preset times, data acquisition, and archiving on DVD. We can also control the whole system through modem or Internet. The instrument can be used either by itself or in conjunction with other instruments to study the onset and evolution of solar radio bursts and associated interplanetary phenomena.

Experimental Astronomy, Volume 21, Issue 1, pp.41-55

References in corpus (1)

• ARTEMIS IV Radio Observations of the 14 July 2000 Large Solar Event

Cited by in corpus (12)

• Variable emission mechanism of a Type IV radio burst
• An Eruptive Hot-Channel Structure Observed at Metric Wavelength as a Moving Type-IV Solar Radio Burst
• Multi-wavelength Observations of a Metric Type-II Event
• Detection of spike-like structures near the front of type-II bursts
• High resolution observations with Artemis--JLS, (II) Type IV associated intermediate drift bursts
• Sources of SEP Acceleration during a Flare-CME Event
• Extended radio emission associated with a breakout eruption from the back side of the Sun
• Metric radio bursts and fine structures observed on 17 January, 2005
• First detection of metric emission from a solar surge
• Space storm measurements of the July 2005 solar extreme events from the low corona to the Earth
• High-resolution observations with ARTEMIS/JLS and the NRH: IV. Imaging spectroscopy of spike-like structures near the front of type-II bursts
• Solar radio bursts observations by Egypt- Alexandria CALLISTO spectrometer: First results