<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 23:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.17 (076) 23:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202607603172300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.082" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.964" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="380.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="355.594" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="326.830" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.066" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="44.190" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.016" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="21.810" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="53.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="96">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 325.000 335.000 350.000 355.000 365.000 375.000 380.000 379.000 378.000 377.000 376.000 375.000 380.000 376.667 373.333 370.000 367.500 365.000 365.000 367.500 370.000 370.000 375.000 373.000 371.000 369.000 367.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 364.333 363.667 363.000 362.333 361.667 361.000 360.333 359.667 359.000 358.333 357.667 357.000 356.333 355.667 355.000 355.000 355.000 356.000 357.000 358.000 359.000 360.000 362.500 365.000 366.667 368.333 370.000 370.000 370.556 371.111 371.667 372.222 372.778 373.333 373.889 374.444 375.000 380.000 378.333 376.667 375.000 374.167 373.333 372.500 371.667 370.833 370.000 370.000 370.000 375.000 370.000 365.000 370.000 375.000 377.500 380.000 385.535 393.389 405.406 426.090 470.104
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 57 54 60 0 0 57 0 0 0 0 54 48 0 0 60 54 54 63 57 57 54 57 0 57 54 0 54 0 0 54 0 0 54 54 0 0 0 0 0 0 57 0 0 51 51 0 0 48 0 51 0 0 0 0 51 0 54 0 0 51 51 0 51 54 51 51 51 0 54 51 51 54 0 51 0 0 0 0 0 54 0 51 51 0 57 51 48 51 48 54 54 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 0.390625 -0.390625 -0.390625 0.390625 0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -1.171875 -0.390625 1.171875 2.734375 0.390625 -1.171875 1.171875 1.171875 0.390625 -1.171875 0.390625 0.390625 1.171875 1.171875 -0.390625 1.171875 0.390625 0.390625 -1.171875 -0.390625 1.171875 -0.390625 0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 1.171875 -1.953125 -1.171875 -0.390625 -0.390625 0.390625 1.171875 -1.171875 1.171875 -2.734375 1.171875 0.390625 -1.171875 0.390625 0.390625 1.171875 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 1.171875 -0.390625 1.171875 0.390625 -1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 -2.734375 -1.171875 1.171875 1.953125 0.390625 -1.953125 -0.390625 -1.953125 -0.390625 1.171875 -0.390625 1.953125 -0.390625 -0.390625 0.390625 -0.390625 1.953125 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="116">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.957 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.913 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.87 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.594 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.309 0.281 0.242 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.232 0.255 0.277 0.3 0.323 0.346 0.354 0.393 0.483 0.619 0.784 0.958 1.133 1.309 1.488 1.671 1.859 2.055 2.259 2.474 2.7 2.938 3.192 3.462 3.751 4.06 4.394 4.753 5.143 5.565 6.02 6.507 7.015 7.508 7.911 8.098 8.1 8.069 7.966 7.803 7.592 7.343 7.066 6.769 6.46 6.144 5.828 5.513 5.205 4.904 4.613 4.334 4.066 3.811 3.569 3.339 3.122 2.918 2.725 2.544 2.374 2.215 2.066 1.926 1.795 1.673 1.559 1.453 1.353 1.261 1.174 1.094 1.019 0.948 0.883 0.822 0.766 0.713 0.664 0.618 0.575 0.536 0.499 0.464 0.432 0.402 0.375 0.349 0.325 0.302 0.281 0.262 0.244 0.227 0.211

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.1" PeakHeight="355.594" Num="5" zHalfNm="326.83" Error="4.822">
-120.469 -37.827 19.058 -2.619 -1.867
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.87" Depth="0.154"/>
<TopsideChapman PeakHeight="355.594" PeakDensity="814019.9" PeakScaleHeight="21.81" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
