The solar radio noise is measured daily with amateur
instrumentation,
theat means I use an old communication receiver AR3000 modified
for radio astronomy purposes. The detector is composed of an analoge
multiplier
S042P (Siemens). The Yagi-antenna is a standard TV antennae
(BIV/V) for channel 37.
The antennae is
fixed in meridian,
but the elevation is tilted once or twice per month according
to the actual elevation of the suns orbit (Transit Meridian
Instrument).
The receiver is
programmable
via RS232 with a Windows compatible PC running under XP and Borland
Builder 6. This PC is also part of
the internal network, thus the data can be captured very easily. Every
month a graph and a listing will be produced and stored in the archive
below.
During 2019, after 23 years of observation local radio interference (due to DVB-T and mobile phone activity)
went terribly strong and wide-band, such that solar flux observations went impossible. Observation of dynamic solar radio burst in continuing.
Actual measurements | |
---|---|
![]() Frequency agile solar radio spectrometer CALLISTO-01. Frequency range 1110 MHz - 1750 MHz. Antenna LPDA from Wittenberg company, Germany. |
![]() Frequency agile solar radio spectrometer CALLISTO-02. Frequency range 10 MHz - 80 MHz. Antenna BICONE from Schwarzbeck company, Germany. Weather station WH65LP |
Equipment: | |
---|---|
![]() |
Backend rack, hosting power supplies, CALLISTOs, front-end control-unit, GPS and computer. Rack can be closed by a metallic door to reduce self produce rfi. |
![]() |
Focal plane unit containing calibration unit, band pass filter, low noise amplifier, isolator, mixer, local oscillator, low pass filter and driver electronics for microwave relais. |
![]() |
LPDA LAT-50 from Wittenberg company, Germany. Gain 11 dB at 1420 MHz. Beam ~ 52° x 44°, max VSWR 1.6 between 700 MHz and 2800 MHz. |