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Demod. Sig. (I & Q) Calibration 1. Orb/Lan sound corresp 2. Notch control 3. I/Q balancing 4. GCW correc. 5. Absolute calib Aux. data: - Orb pos - Radiation.

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Presentation on theme: "Demod. Sig. (I & Q) Calibration 1. Orb/Lan sound corresp 2. Notch control 3. I/Q balancing 4. GCW correc. 5. Absolute calib Aux. data: - Orb pos - Radiation."— Presentation transcript:

1 Demod. Sig. (I & Q) Calibration 1. Orb/Lan sound corresp 2. Notch control 3. I/Q balancing 4. GCW correc. 5. Absolute calib Aux. data: - Orb pos - Radiation patterns (foot & solar panels pos + BW) - sound. dates - sound start + end + sampling fact - Orb/Land orientations - Orb & Land Temp. - … Compression 1. theo. code 2. library 3. model: fully analytical 4. model: ana. + extract. filt. - Desadapted code ? Transponder - Orb. delay correction - Radargram: bloc sliding - mod us Aux. - Link budget - Orbito: - convertion repères - format - interp/sampling sound. dates General user script param: -I/Q power value balancing (typ 5%) -Upsampling fact. -> compression (typ 50, 100) -Upsampling fact. -> alias modeling(typ 2) -Up. compression method -Min path delay difference(typ 1/BW) Output: HDF5 files - compressed signals - estim. delays & amplitudes - orbito - …

2 Inputs: - Demod. sig. (I & Q) - GCW - Temp. Calibration 1. Orb/Lan sound correspondance 2. Notch control 2. I/Q balancing 3. GCW correc. a. Tempé RX b. Tempé TX 4. Calibration absolue -> dans atténuation canal Output: - Demod. sig. (I & Q) - Valid sound num Param: - I/Q power value balancing (typ 5%)

3 Compression 1. theo. code 2. library 3. model: fully analytical 4. model: ana. + extract. filt. => Desadapted code ? 5. Signal court Input: - Demod. sig. (I & Q) Outputs: - Estimated SNR - comp. sig. - up. comp. sig. Param: - Upsampling factor (typ. 50 or 100)

4 Transponder 1. Orb/Lan delay estim - Successive delay estim (cancellation of one path contrib after each delay estim) ? 2. Delay transponder correc (div 2, error Lan delay estim, absolute delay ~7Ts) 3. mod us 4. Radargram: bloc sliding 5. Pointage à la main -> affichage, ToA, power Orb vs Lan Inputs: - Compression bloc outputs - Optic dist (Orb/Lan) Param: - Min. paths delay diff. (typ. 1/BW) - Delay thresholds for radargram bloc sliding (in % of 25,5 us)

5 Orb. Lan. II. Delay transponder correction

6 Orb. Lan. III. Modulo 25.5 us /2

7 III. Modulo 25.5 us

8 IV. Radargram

9 Long time (sound. num.) Short time (ToA) 25.5 us (25.5 x Thd_down) us (25.5 x Thd_up) us

10 Aux. - Link budget: attenuation (dB) + phase ? - Orbito: - convertion repères - format : SPICE -> ESOC ESOC -> SPICE - interpolation/sampling sound. dates Inputs: - Orbito - Radiation patterns (foot & solar panels pos + BW) - sound. dates - sound start + end + sampling fact - Orb/Land orientations Outputs: - attenuation (dB) - velocity - Orb pos(x, y, z) in land frame

11

12 I, Q power balancing Crude meas. for all the sound. I, Q power bal. value (in %) Crude meas. for all the sound. GCW correction Power calib laws Crude meas. for all the sound.

13 Compression by theo. code local code generation compression Crude meas. for sound. existing on both Orb & Lan Compressed signals Compression by fully anal. model 1. Model signal generation 2. Auto-corr fct computation 3. Inter-corr fct computation 4. Power normalization using auto-corr fct Crude meas. for sound. existing on both Orb & Lan Upsampled compressed signals Upsampling factor Orb & Lan filter model parameters

14 Compression by mixed model 1. Mixed model signal gen. 2. Auto-corr fct computation 3. Inter-corr fct computation 4. Power normalization using auto-corr fct Crude meas. for sound. existing on both Orb & Lan Upsampled compressed signals Upsampling factor Orb & Lan filter model parameters Filter phase Path param. estimation 1. Estim of the strongest path (amplitude, delay, phase) 2. Estim SNR => thld path power 3. Estim of the delays, amplitudes, and cst phase Upsampled compressed signals Estim. delays Estim. amplitudes Estim. cst phases Estim SNR Min path delay difference Noise thd shift

15 Transponder delay correction 1. Extract decimal part of relative Lander delays 2. Lan estimated delay correction 3. Cst syst. delay compensation 4. Division by 2 Orb & Lan delaysCorrected Orb delays Modulo correction 1.Estimation of N 2.ToA estimation Orb & Lan delays Orb & Lan comp. signals Optical distance Orb/Lan Orb/Lan ToA N values Orb & Lan comp. signals Cst system delay

16 Orb & Lan ToA Orb & Lan ampli. Data for radargram display: Compressed sig. ToA bloc origin Thd up Thd down Lander synchro. correction 1.Decompression 2.Zero padding: 21 -> 255 samples 3.Compression with model 4.Decimal part: Lander short signal: 21 samples

17 Lander complete signal Orbiter compressed signal Orbiter compressed signal


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