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Long wave planetary radar (LPR)

Long wave planetary radar (LPR). Subsurface radar sounding of the Fobos ground. N.A.Armand , V.M.Smirnov , V.N.Marchuk , O.V.Yushkova , Institute of Radioengineering and Electronics of RAS, Moscow V.V.Abramov , A.S.Bazhanov 2 Special Design Bureau of IRE RUS, Fryazino , Russia. .

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Long wave planetary radar (LPR)

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  1. Long wave planetary radar(LPR) Subsurface radar sounding of the Fobos ground N.A.Armand, V.M.Smirnov, V.N.Marchuk, O.V.Yushkova, Institute of Radioengineering and Electronics of RAS, Moscow V.V.Abramov, A.S.Bazhanov2 Special Design Bureau of IRE RUS, Fryazino, Russia.

  2. The experiment purpose, expected results Revealing of Phobos deep structure Estimation of in-situ rock density of Phobosground Research of a relief and roughness of Phobossurface Estimation of dielectric properties of a ground on different depths along a line of the spacecraft flight

  3. THE PHYSICAL SCHEME OF EXPERIMENT SC Reflection of surface Reflection of subsurface layers Phobosstructure Layer 1 Layer 2 Layer 3

  4. THE PHYSICAL SCHEME OF EXPERIMENT Distance less then 1 km Distance higher then 1 km

  5. The scheme of carrying out of survey sounding of a Phobos surface by the radar LPR in a quasisynchronous orbit Spacecraft orbit Mars Phobos Phobos orbit Height 50 – 100km. Mode 1: 1 measurement per 90 seconds, 8191 sub pulses in a code keying signal

  6. The scheme of survey sounding of a Phobos surface

  7. The scheme of survey sounding of a Phobos surface

  8. The scheme of carrying out of detailed sounding of a Phobos surface by the radar LPR in a quasisynchronous orbit Height 50 – 60 km. Mode 2: 2 measurement per second, 2047 sub pulses in a code keying signal. It is planed 6 sessions in 10 min durations. Spacecraft orbit H=50km L=vt Phobos surface

  9. The scheme of detailed sounding of a Phobos surface in a quasisynchronous orbit

  10. The scheme of carrying out of sounding of a Phobos surface by the radar LPR at spacecraft landing Height from 20 km to100 m. Two sessions duration for 10 minutes, on 2 measurements per second. Mode 3 - 255 sub pulses in a signal. Mode 4 - a monoimpulse. H=20km Mode 3 H=1km Mode 4 H=100 m Phobos surface

  11. The scheme of a Phobos surface sounding at spacecraft landing

  12. LPR outward appearance

  13. Device LPR technical characteristics

  14. Main parameters of operating modes of the radar LPR

  15. Probing signal of device LPR and its spectrum S(N) N • Spectra of a device DPR signal: by a green line the spectrum of an individual radio impulse, dark blue – code keying signal of 2047 sub pulses is shown • .

  16. Device LPR information capacity

  17. Modeling of a LPR signal restoration (М=2047) at a signal to noise ratio -15dB is shown U(N) N U(N) N

  18. Modeling of a LPR signal restoration (М=2047) at a signal to noise ratio -15dB is shown U(N) N U(N) N

  19. Thanks for attention

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