T. Bullet - lisn

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Floating Point Output● Digital Down-converter AD6624 has internal 24bit RAM Coefficient Filter (RCF)● USB2 interface limits raw data to 16 bits per I/Qsample● Current software reports 16 bit signed integer● Floating point mode is tested●●12 bit mantissa + 4 bit exponentIncreases Theoretical dynamic range from90dB to 138dB●●Better noise observationsImproves strong interference tolerance
RCF Mapping23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 14 6 13 5 12 4 11 3 14 2 13 1 12 024 bit RCFxxx x x15 14 13 12 11 10 9 8 7 14 6 13 5 12 4 11 3 14 2 13 1 12 0x x x16 Bit FixedM11 M10 M9 M8 M7 M6 M5 M4 M3 M2 14 M1 13 M0 12 E3 11 E2 14 E1 13 E0 1212+4 Floating Point
Page 1 and 2:
High Frequency RadarsandIonospheric
Page 3 and 4:
Earth's Ionosphere●●●●●Pl
Page 6 and 7:
Radio Waves in PlasmasPlane Wave El
Page 8 and 9:
Appleton EquationA magneto-plasma i
Page 10 and 11:
Virtual Height and Density Profiles
Page 12 and 13:
Propagation through a LayerhmEfoE
Page 14 and 15:
What is an Ionosonde and what does
Page 16 and 17:
Courtesy IPSClassic Ionogram
Page 18 and 19:
Digisonde 256 DataIonogram data wit
Page 20 and 21:
Dynasonde21Dynasonde Ionogram Analy
Page 22 and 23:
●●Plasma Physics with Ionosonde
Page 24 and 25:
Analysis Background●●High SNR v
Page 26 and 27:
Circular Polarization
Page 28 and 29:
Polarization Example
Page 30 and 31:
●Radar TimingT 0is the start of a
Page 32 and 33:
●●●Precision RangeUse the hig
Page 34 and 35:
Doppler Shift●●●Doppler shift
Page 36 and 37:
Interferometry k 1 2DResearch Oppor
Page 38 and 39:
End of Section 1Questions?
Page 40 and 41:
Ionosonde History● The first rada
Page 42 and 43:
Courtesy Manila Ionosphere Observat
Page 44 and 45: Manual Scaling SheetsA month (Jan 1
Page 46 and 47: NOAA Dynasonde DataCourtesy of Brit
Page 48 and 49: Expert System forIonogram Reduction
Page 50 and 51: Autoscala●●●●●Italian aut
Page 52 and 53: ARTISTDirectogramVelocitiesSkymapIo
Page 54 and 55: VIPIR Radar FeaturesVery high inter
Page 56 and 57: Wallops Island VIPIR hardwarePower
Page 58 and 59: What makes a World Class Ionosonde?
Page 60 and 61: Transmit Antenna Performance
Page 62 and 63: Receive Antennas4m dipoles , 5m hig
Page 64 and 65: Radar Engineering
Page 66 and 67: Fresnel ZoneD, AThe area over which
Page 68 and 69: Atmospheric Noise Factor at HF●No
Page 70 and 71: SignalS= P t G t 1 2 G r16 R 2 L p
Page 72 and 73: SNR Example (1 MHz)●●●Antenna
Page 74 and 75: End of Section 2Questions?
Page 76 and 77: SPGR●●●●●●The virtual h
Page 78 and 79: Ramps, Repeats and Ionograms●●
Page 80 and 81: TimeTimeTimeShuffle ModeInterleave
Page 82 and 83: Shuffle Mode Fixed Frequency
Page 84 and 85: Space Shuttle Modified IonosphereMo
Page 86 and 87: VIPIR Operation●●●Operating t
Page 88 and 89: Sounding Configuration Table●●B
Page 90 and 91: SCT Timing! Timing of the measureme
Page 92 and 93: SCT Receiver and Exciter! Receiver
Page 96 and 97: Large Signal TestsInternal noise is
Page 98 and 99: Preamp Calibration
Page 100 and 101: San Juan upgrade and calibrationApr
Page 102 and 103: Wallops Rx Cables: After
Page 104 and 105: ●●DC bias in Calibration Circui
Page 106 and 107: Free VIPIR Software●riq-ionogram
Page 108 and 109: Science and Engineering Needs●●
Page 110: Credits●●●●●●●●●
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