ALOS Data Users Handbook

ALOS Data Users HandbookThe main characteristics and operation modes of PALSAR are shown in Tables 3.2-9 and 3.2-10 respectively.Table 3.2-9 PALSAR Calibration ModeMode Content RemarksNoise Measure 1 Measure the noise level when one transmission-receiving module is onwith termination of module LNA input.PeriodicallyNoise Measure 2 Measure the noise level when all transmission-receiving modules are on performedwith termination of module LNA input.Noise Measure 3 Measure the noise level when the only transmission module is off withouttermination of module LNA input.PerformedTransmitter Power Monitor transmission power of each TR modulefor eachMonitorobservationTransmitter Wave Pattern Loop back RF signal at the calibration module of the receiving assembly;Monitorreplica of transmission wave pattern is obtained.Receiving REV Receive RF transmitted from the REV antenna, and calibrate antennapattern using a tone signal.Transmission REV Receive RF transmitted from the observation antenna by the REV antenna,and calibrate antenna pattern using a tone signal.Total Characteristics ofReceiving SystemReceive calibration signal transmitted from the REV antenna, and measuretotal characteristics of the receiving system using a tone signal.Total Characteristics of Receive RF transmitted from the observation antenna by the REV antenna,Transmission System and measure total characteristics of the transmission system using a toneOptionsignal.I/O Characteristics whenReceivingInput calibration signal directly to receiving signal at the receivingassembly not though the antenna assembly using a tone signal.ATT Characteristics of Input calibration signal directly to receiving signal at the receivingReceiving SystemFrequency CharacteristicMeasure of ReceivingSystemassembly not though the antenna assembly using a tone signal.Receive and measure calibration signal transmitted from the REV antennawith variable frequencies of tone signals.Table 3.2-10 PALSAR Observation ModeModeContentHigh Resolution High resolution observation by single polarization or simultaneous receiving oftwo polarizationsScanSARWide area observation by ScanSAR (single polarization)The same data rate as that of the high resolution mode or half this rate.Direct Downlink Observation with half the rate of that of the high resolution mode (singlepolarization)Polarimetric Observation with four polarizations simultaneouslyNote: Each observation mode is broken down into more parts depending on polarization and off-nadirangle, etc.3-17