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MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Mars Express Data WorkshopMars Express Data Workshop
ESAC, Villafranca del CastilloESAC, Villafranca del CastilloMadrid (Spain)Madrid (Spain)
MARSIS Instrument & Operation ConceptsMARSIS Instrument & Operation Concepts
9 -11 June 20089 -11 June 2008Andrea CicchettiAndrea Cicchetti
Raffaella Noschese, Marco Cartacci, Stefano GiuppiRaffaella Noschese, Marco Cartacci, Stefano Giuppi
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Table Of ContentsTable Of Contents
1. MEX Orbital Configuration.2. MARSIS Working Range.3. Night Time Environment.4. Day Side Environment.5. Example of MARSIS Timeline.6. Main Instrument Parameters.7. MARSIS Block Diagrams .8. Tracking and Acquisition Concepts.9. Doppler Processing.10.Raw Data Collection (Flash Memory Utility)11.Global Coverage per Band achieved until
29/Feb/0812.Phobos Observation Criteria and latest Results.13.Overview of the Support Tools
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
1 MEX Orbital Configuration1 MEX Orbital Configuration
Mars Express was Mars Express was successfully launched on successfully launched on 2 June 2003 from 2 June 2003 from Baikonur, Kazakhstan, by Baikonur, Kazakhstan, by a Russian Soyuz rocket.a Russian Soyuz rocket.
Following a cruise of Following a cruise of almost 7 months, the SC almost 7 months, the SC was captured into orbit was captured into orbit on 25 December 2003 on 25 December 2003 and soon established a and soon established a highly elliptical polar highly elliptical polar orbit with a closest orbit with a closest approach to the surface approach to the surface of about 300 Km and a of about 300 Km and a period of about 6.65 hperiod of about 6.65 h
Periapsis ~ 300Km
Apoapsis~ 10.000Km
N
w
ORBIT 5851
Event UTC PERI2008 JUL 23 03:37:24
MEX Orbital Plane
Mars
MARSIS MARSIS Working Slot Working Slot
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
2 MARSIS Working Range2 MARSIS Working Range
~ 300Km
SC Altitude
Mars
~ 1200Km
~ 900Km
AIS AIS
5 min 5 min
Sub Surface Sounding Modes or AIS
30 min
MARS Pericenter
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
3. Night time Environment3. Night time Environment
H2O Deposit
~ 5 Km
MARS Surface
MARS Sub Surface
~130 Km
Soft Ionosphere Layer
1.8 MHz3.0 MHz
Good Penetration Capabilities
Dipole antenna
Monopole antenna
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
4. Day time Environment4. Day time Environment
H2O Deposit
~ 1-2 Km
MARS Surface
MARS Sub Surface
4.0 MHz5.0 MHz
Dipole antenna
Monopole antenna
80 ~130 Km
Strong Ionosphere Layer
Acceptable Penetration Capabilities
The lowest Bands (1.8 and 3.0 MHz)Will be completely reflected by the Ionosphere layer
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
In the deep day side it is not possible to use the lowest radar bandsdue to the upper ionosphere layer that will completely reflects the MARSIS Signals.
Mars Surface
Orbit 4628 (11/Aug/07)
295.7 Km
Upper Ionosphere Layer in the day side
150 Km
145.7 Km
4.1 Ionosphere Reflection proprieties in the day side
Band 1 (1.8 MHz)
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
5 Example of MARSIS Timeline5 Example of MARSIS Timeline
SC [SEA]/Altitude
AIS
Time Off Peri [min]
-15°
SS3B1/B2
SS3B2/B3
SS3B3/B4
AISAIS
0°
35°
-20.0 -15.0 0.0 15.0 20.0
~1200 Km ~1200 Km
~ 900 Km ~900 Km
~ 300 Km
Day Side
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
6 Main instrument Parameters6 Main instrument Parameters
Sub Surface Sounding ParametersSub Surface Sounding Parameters
Centre Frequencies:Centre Frequencies:Band 1 Band 1 1.8 MHz 1.8 MHzBand 2 Band 2 3.0 MHz 3.0 MHzBand 3 Band 3 4.0 MHz 4.0 MHzBand 4 Band 4 5.0 MHz 5.0 MHz
Bandwidth = 1.0 MHz Bandwidth = 1.0 MHz δδ= 150m (free space depth resolution) = 150m (free space depth resolution) Transmit pulse Length = 250 usTransmit pulse Length = 250 usPRF = 127.267 Hz (Pulse Repetition Frequency)PRF = 127.267 Hz (Pulse Repetition Frequency)Receive Window Size = 350us Receive Window Size = 350us Sounder Dynamic Range = 40 to 50 dBSounder Dynamic Range = 40 to 50 dB
Surface Sounding Altitude Range = 250 to 900 KmSurface Sounding Altitude Range = 250 to 900 Km
Ionospheric Sounding ParametersIonospheric Sounding Parameters Maximum Altitude = 1200 KmMaximum Altitude = 1200 Km
Frequency Range = 0.1 to 5.5 MHzFrequency Range = 0.1 to 5.5 MHz
δδ= 15 Km= 15 Km
Bandwidth = 10 KHzBandwidth = 10 KHz
Transmit Pulse Length = 91.43 usTransmit Pulse Length = 91.43 us
Minimum Frequency Step = 10.937 HzMinimum Frequency Step = 10.937 Hz
Repetition Period = 7.38sRepetition Period = 7.38s
Dipole Antenna element length = 20 mDipole Antenna element length = 20 mMonopole Antenna length = 7 mMonopole Antenna length = 7 m
Total Mass = 20 KgTotal Mass = 20 KgDC Operation Power = 60 WDC Operation Power = 60 W
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
7 MARSIS Block Diagram7 MARSIS Block Diagram
MARSIS Consist ofMARSIS Consist of : :
1.1. A sounder channel containing a programmable signal generatorA sounder channel containing a programmable signal generator2.2. a surface cancellation channela surface cancellation channel3.3. a dual channel data processora dual channel data processor4.4. a power and control subsystem which controls all the sounder functionsa power and control subsystem which controls all the sounder functions
A/D Converters A/D Converters Operate at a Sampling frequency of 2.8 MHz (8 bit) Operate at a Sampling frequency of 2.8 MHz (8 bit)
PowerPowerAndAnd
ControlControl
ProcessorProcessor
S/CS/C
TransmitterTransmitter
ReceiverReceiver
SignalSignalGeneratorGenerator
Analog toAnalog toDigitalDigital
ConverterConverter
11
ReceiverReceiverAnalog toAnalog to
DigitalDigitalConverterConverter
22
33
44
MonopoleMonopole
DipoleDipole I/QI/QSynthesisSynthesis
I/QI/QSynthesisSynthesis
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
7.1 Subsurface Sounding Processing Functionalities
IonosphericIonosphericCalibrationCalibration
TrackingTracking AcquisitionAcquisitionPassive Passive
IonosphericIonosphericSoundingSounding
Range & DopplerRange & DopplerProcessingProcessing
Range & DopplerRange & DopplerProcessingProcessing
Data Data PresummingPresumming
TimingTimingSystemSystem
From I/Q Synthesis
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
7.2 Subsurface Sounding Mode SS1 (2 Frequencies – 2 Antennas – 1 Doppler Filter)
Rx Dipole Ch
RX1
RX2
450 us
t [us]
Trigger
Tx Phase
TX1
TX2
250 us 250 us
450 us
t [us]
Two frequencies operation: Two frequencies operation:
four echoes are received, two from Dipole four echoes are received, two from Dipole channel and two from Monopole channel. channel and two from Monopole channel.
Echoes are processed to synthesize a Echoes are processed to synthesize a single Doppler filter. single Doppler filter.
Complex data for each of the four Complex data for each of the four synthesized Doppler filters, before range synthesized Doppler filters, before range compression, are transferred in the compression, are transferred in the science source packet data format.science source packet data format.
This mode allows coherent clutter This mode allows coherent clutter cancellation on two frequency bands by cancellation on two frequency bands by means of dual antenna clutter cancellation means of dual antenna clutter cancellation ground processing.ground processing.
Rx Monopole Ch
RX1
RX2
450 us
t [us]
Trigger
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
7.3 Subsurface Sounding Mode SS2 (2 Frequencies- 1 Antenna (dipole) – Onboard Multi-look)
Rx Dipole Ch
RX1
RX2
450 us
t [us]
Trigger
Tx Phase
TX1
TX2
250 us 250 us
450 us
t [us]
Two frequencies operation: Two frequencies operation:
two echoes are received, two from Dipole two echoes are received, two from Dipole channel. channel.
Echoes from the Monopole channel are not Echoes from the Monopole channel are not processed, while echoes from the Dipole processed, while echoes from the Dipole channel are processed to provide a channel are processed to provide a Multilooked information for a single Doppler Multilooked information for a single Doppler filter using parallel synthesis of five Doppler filter using parallel synthesis of five Doppler filters on board. filters on board.
The power detected samples for each of the The power detected samples for each of the two multilooked Doppler filters synthesized two multilooked Doppler filters synthesized are transferred in the science source packet are transferred in the science source packet data format.data format.
Rx Monopole Ch
t [us]
No signals processed from MonopoleChannel
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
7.4 Subsurface Sounding Mode SS3
Rx Dipole Ch
RX1
RX2
450 us
t [us]
Trigger
Tx Phase
TX1
TX2
250 us 250 us
450 us
t [us]
Two frequencies operation: Two frequencies operation:
This mode allows downlink, for each frame, This mode allows downlink, for each frame, of the I and Q data of three Doppler filters of the I and Q data of three Doppler filters collected on the dipole antenna channel at collected on the dipole antenna channel at two frequencies. two frequencies.
Range processing is performed on the Range processing is performed on the ground.ground.
Rx Monopole Ch
t [us]
No signals processed from MonopoleChannel
99.99 % Of the data have been 99.99 % Of the data have been collected with this modalitycollected with this modality
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
7.5 Subsurface Sounding Mode SS5
Single frequency operation: Single frequency operation:
two echoes are received, one from the two echoes are received, one from the Dipole and one from the Monopole. Dipole and one from the Monopole.
Echoes are actually pre-summed over Echoes are actually pre-summed over groups of four to increase the Signal to groups of four to increase the Signal to Noise Ratio. Noise Ratio.
Pre-summed Echoes are processed to Pre-summed Echoes are processed to synthesize three central Doppler filters for synthesize three central Doppler filters for each channel. each channel.
Complex data of the six synthesized Complex data of the six synthesized Doppler filters before range compression, Doppler filters before range compression, are transferred in the science source packet are transferred in the science source packet data format.data format.
This mode uses a short pulse waveform to reduce This mode uses a short pulse waveform to reduce the impact of uncontrolled sidelobes on deep the impact of uncontrolled sidelobes on deep subsurface reflectionssubsurface reflections
Tx Phase
TX1
30 us
t [us]
TX2
TX3
TX4
Rx Dipole Ch
t [us]
TriggerTX1
TX2
TX3
TX4
Rx Monopole Ch
t [us]
TriggerTX1
TX2
TX3
TX4
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
TransmitterTransmitter
ReceiverReceiver A/DA/D BufferBuffer AzimuthAzimuthCompressionCompression
RangeRangeCompressionCompression
&&IonosphereIonosphere
CompensationCompensation
LoL LogicLoL Logic
Acquisition ModalityAcquisition Modality
Tracking Lost
Preset TrkH = 674Km
Set by the User
Trig ~ 4493 us“ Calculated by MARSIS”
AGC TrackingAGC Tracking Range TrackingRange Tracking
Preset Trk ?Preset Trk ?yes not
Mars
8 Tracking & Acquisition Concepts8 Tracking & Acquisition Concepts
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
8.1 Timing of Tracking and Acquisition
NPNNPN Rx Gate Acq.Rx Gate Acq.
1400 us36
5.7
1 u
s
91
.43
us
1000 us
Rx_Trig_AcqPassive Ionosphere Gate
ACQ Band = 200 KHz
Acquisition Timing
Tx F1Tx F1
350 us 91
.43
us
25
0 u
s
Rx_Dist_F1Passive Ionosphere Gate
TRK Band = 1.0 MHz
Tracking Timing (SS3)
Tx F2Tx F2
Rx Gate F1Rx Gate F1 Rx Gate F2Rx Gate F2
350 us
25
0 u
s
450 us
Rx_Dist_F2
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
8.2 Tracking Initialization Overview (Worse Case)MARSIS starts to operate
Ionosphere Layer Ionosphere Layer 100 us is the maximum delay in the day 100 us is the maximum delay in the day
H = 400 Km 2666.7 us
Rx Phase
Time [us]
250 us
400 Km 2666.7 us
Extra delay
350 us
150 us
Chirp Length
50 us Lost
MEX Orbit
h~7.5 Km50us
Hellas Planitia (minimum depression)Mars Topography
Range PolynomialCoefficients
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
8.3 (Timeline) Example of the Tracking effect
SS3B3/B2OST 4
SC [SEA]/Altitude
AISOST 7
Time Off Peri [min]
SS3B4/B3OST 3
AISOST 0
12°
-18.0 -13.0 -7.5 -1.5 13.0 18.0
761 Km
SS3B2/B1OST 5
5°
478 Km
-5°
314 Km
763 Km
-23°
Orbit 1885 – 4/July-2005“ First Routine Orbit”
Fake SS2
“Tx Slow Power UP”-No Science-
Fake SS3(15”/30”)
“Band inversionBefore each
AIS”B1/B2
-No Science-
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
8.4 (Level 2 data) Example of the Tracking effect
OST 3 (B4) OST 4 (B3) OST 5 (B2)
Trigger Offset
Trigger Compensated“L2 Product from PSA”
Tracking Lost“Low SNR”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
8.5 (Level 2 data) Example of the Tracking effect
Tracking lost due to the low SNR rate.
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
9 Doppler Processing9 Doppler Processing
DPL
Range
Along Track
HDPL 22
Where:H SC altitudeδ Range Resolution (150m)
MEXFly direction
δH
9.1 Observation GeometryRange
Along Track
Cross Track
DPL
MEXFly direction
Main ContributionFrom the
Mars Surface
Dipole Antenna
Monopole Antenna
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
9.2 Doppler Processing
Range
Along Track
Cross Track
DPL
MEXFly direction
Main ContributionFrom the
Mars Surface
Dipole Antenna
Monopole Antenna
Data AcquisitionData Acquisition
Range
Along Track
Cross Track
DPL
MEXFly direction
Main ContributionFrom the
Mars Surface
Dipole Antenna
Monopole Antenna
IncreasedAzimuth
Resolution
On Board Doppler ProcessingOn Board Doppler Processing
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
10. Raw Data Collection (Flash Memory Utility)10. Raw Data Collection (Flash Memory Utility)
Orbit 3990Start Lat=12.4NP-60 (Time Off Pericenter)
SS3B3/B2
SS3B4/B3
SEA=0°
-120 S 0.0 S-300 S
Raw Data Start Acq.
On Board On Board ProcessingProcessing
Raw DataCollection
Flash Memory
SC
In
terf
ace
SC
In
terf
ace
DipoleAntenna
Flash Memory Blocks Diagram
Science AreaOf Interest
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
11. Global Coverage achieved until 29/Feb/0811. Global Coverage achieved until 29/Feb/08
MARSIS MARSIS OperationOperation
Centre Centre Main ArchiveMain Archive
All FramesAll FramesSNRSNR
Evaluation Evaluation SWSW
GlobalGlobalCoverageCoverage
Sub ArchiveSub Archive
OptimumOptimumFramesFrames
18 dBGeneric Fr……
Generic OST Line Ch1
Generic Fr……
Generic OST Line Ch2
Generic Frame, SNR ~ 18 dBFrame Selection within an OST line
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
11.1 Band 2 Global Coverage
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
11.2 Band 2 Global Coverage
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
11.3 Band 3 Global Coverage
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
11.4 Band 4 Global Coverage
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
12. Phobos Observation Criteria and latest Results12. Phobos Observation Criteria and latest Results
Orbit number: 5851
Time Period2008 JUL 23 04:50:51
Minimum Flyby distance:
93 km !!MEX
Orbital Plane
Closest Approach“ Phobos Data Take”
Mars
PhobosOrbital Plane
Phobos
Periapsis ~ 300Km
Apoapsis~ 10.000Km
ApproachEncounter
Departure
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Protection Zone
Range [Km]
Offset Time [us]
0 1600-1600
240
~ 93
Working Zone Working Zone
With the standard on board configuration it is not possible the Phobos detection
12.1 Limitation of the Standard Onboard Configuration
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
12.2 Timing of the Standard on board configuration
Tx Phase
TX1
TX2
250 us 250 us
450 us
700 us
Time [us]
Rx Phase
Time [us]
SW limitation
1600 us
1600+50 us us 240+7.5 KmRX1
RX2
RX1 RX2
50us of margin (7.5 Km)
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Tx Phase
TX1
TX2
250 us 250 us
450 us
700 us
Time [us]
Rx Phase
Time [us]
SW limitation
1600 us
RX1
RX2
RX1 RX2
240 Km
12.3.1 Reduction of the SW limitation “First level of range extension”
1550 us
247.5Km 240Km.
7.5Km less !!
12.3 Techniques to reduce the instrument Protection Zone
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Tx Phase
TX1
TX2
250 us 250 us
450 us
700 us
Time [us]
Rx Phase
Time [us]
SW limitation
1550 us
RX1
RX2
RX1 RX2
450 us67.5 Km
12.3.2 Ambiguity Technique “Second Level of Range Extension”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Tx Phase
TX1
TX2
250 us 250 us
450 us
700 us
Time [us]
Rx Phase
Time [us]
SW limitation
1550 us
1150 us157.5 Km
240Km 157.5Km.
82.5 Km less !!
RX1
RX2
RX1 RX2
450 us
12.3.2.1 Timing of the ambiguity Technique
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Tx Phase
TX1
TX2
250 us 250 us
450 us
700 us
Time [us]
Rx Phase
RX1
RX2
RX1 RX2
975 us146.25 Km
157.5Km 146.25Km. 7.5Km+3.75Km=11.25 Km
less !!
247.5Km 146.25Km.
101.25 Km less !!SW limitation
1550 us
450 us125 us
12.3.3 Margin back in the game (50+125us) “ Third level of range extension”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Protection Zone
Range [Km]
Offset Time [us]
0 1600-1600
240
~ 93
Working Zone Working Zone
975-975
146
12.4 Overview of the Reduced Protection Zone
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Total Number Frames = 36+36 = 72Total Number of echoes = 3240 + 3240 = 6480
Offset Time [us]
CALLow
Power
TX Slow Power Up
PREOSTBY
CALMedi
Power POST
0
SS3B3/B336”
SS3B3/B336” AIS
2m0”AIS
1m57”
-75 -39 39 75 195 315-177
-279
-399
-699
235 Km
146 Km
~ 93
Range [Km]
12.5 Consolidated Timeline and prediction of the results
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Display of the generic echo
MEX Fly directio
n
SNR÷20dB
12.6 Latest Phobos flyby results 07/Oct/2007
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Overview of the Matlab Support Tools
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13 Overview Of the Support Tools13 Overview Of the Support Tools
13.1 Support Tool “Basic Level”
Get FileGet FileRead HeaderRead Header
fieldsfieldsRead Scientific Read Scientific
DataData
Linear/dBLinear/dBConversionConversion
Write OutputsWrite OutputsFilesFiles
Display Display PlotsPlots
FRM_SS3_TRK_CMP_RDR_1885.DAT
Output Files
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.1.1 Basic Level Tool “Main Output”
Science DataScience Data
Header DataHeader Data
11
9494
9595
607607
94 Elements
512 Elements
Generic Frame
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
Get FileGet FileRead HeaderRead Header
fieldsfieldsRead Scientific Read Scientific
DataData
FRM_SS3_TRK_CMP_RDR_1885.DAT
LinearLineardBdB NoiseNoiseEvaluationEvaluation
dBdB Linear LinearMultiMultiLookLookLinearLineardBdB
Write Write OutputsOutputs
FilesFiles
Display Display PlotsPlots
Output Files
13.2 Support Tool “Advanced Level”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.1 Advanced Level Tool “Noise Attenuation Concepts”
350us
t [us]
Pwr [dB]
350us
t [us]
Pwr [dB]
Noise Level
Noise EstimationSlot
Pwr [dB]
350us
t [us]
Shift back of the peak
350us
t [us]
Pwr [dB]
Noise Level
Noise Attenuation
350us
t [us]
Pwr [dB] Noise EstimationSlot
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.2 Advanced Level Tool “Main Output”
The filters (-1,0,+1) collapse in oneRadargram (multi look)
Multi Look Representation
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.3 Advanced Level Tool “ Radargram without the Noise attenuation, Noise_Att=1”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.4 Advanced Level Tool “ Radargram with Noise attenuation, Noise_Att=0.8”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.5 Advanced Level Tool “Single frame visualization, without noise attenuation”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.6 Advanced Level Tool “Single frame visualization, with noise attenuation”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.7 Advanced Level Tool “ Radargram without any range offset”
MARSIS Instrument Overview
Andrea Cicchetti - Infocom Department - University of Rome “La Sapienza”
13.2.8 Advanced Level Tool “ Radargram shifted of 100us down”