ARGOS

1
ARGOS
Status/Progress ETH Zürich

• Actual control software for a single DP105
• On line plot disburdens debugging
• Allan variance single channel 1100MHz
• Allan variance differential 1100MHz-1101MHz
• DC level FFT0 over several days of observation
• Allan variance DC channel over 62.25 hours
• 300K-spectrum 250MHz x 900 sec/file with 5
  spectra/sec
• Sky-spectrum 250MHz x 900 sec/file with 5
  spectra/sec
• Radio navigation burst 250MHz x 900 sec/file with
  5 spectra/sec
• Hot/cold-calibration experiment with broad band
  noise source
• Estimation sky- system temperature of ARGOS
  test-receiver

2
ARGOS
File AcqirisThread.h //-------------------------
--------------------------------------------------
ifndef AcqirisThreadH define
AcqirisThreadH include include
"vpptype.h" include "AcqirisD1Import.h" define
MaxSamples 32768 //------------------------------
--------------------------------------------- clas
s Acqiris public TThread private protected
void __fastcall Execute() public
__fastcall Acqiris(bool CreateSuspended) void
__fastcall ReadConfig(void) void __fastcall
FindDevices(void) void __fastcall
GetDigitalInput(void) void __fastcall
ConfigureDevice(void) void __fastcall
Acquire(void) void __fastcall
Readout(void) //------------------------------
--------------------------------------------- end
if
Application DP105.exe under Windows XP with
Borland C Builder 6 produces rf - spectra as
FITS - files using soft FFT.
File DP105params.cfg simulation0
// 0false, 1true samples512 // 216 sweeptime200 // 100msec timeslot
for one single spectrum prnsave0
// 0false, 1true fitsave1 //
0false, 1true fullscale0.05 // input
range - Volt sampinterval2.0E-9 //
seconds datapathe\argos2\data // place to
save FITS
3
ARGOS

• On line plots makes it easier to debug software
• and to find optimal parameters
• top left time signal (Yt)
• bottom left single spectrum (XY)
• bottom right dynamic spectras (XYZ)

4
ARGOS
Error bars 3sigma (0.997) 1 Tau
0.2sec 1174500 data points 62.25h of
observation
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ARGOS
Error bars 3sigma (0.997) 1 Tau
0.2sec 1174500 data points 62.25h of
observation
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ARGOS
24 hours
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ARGOS
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ARGOS
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ARGOS
Tref Tnull 296K 3K
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ARGOS
Cylindrical horn antenna looking to Zurich
sky Radionavigation band in HB9
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ARGOS
Cylindrical horn antenna looking to Zurich
sky Direct hit of horn feed by microwave
communication
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ARGOS
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ARGOS