<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 21:50:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.20 (079) 21:50:00</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">
FF202607903202150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.962" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.064" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.200" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="421.650" 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="0.404" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="357.939" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="324.179" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.938" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="51.197" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.738" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="24.980" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="59.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.180" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="137">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 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 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 311.000 312.000 313.000 314.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 326.000 327.000 328.000 329.000 330.000 325.000 325.000 326.667 328.333 330.000 330.000 331.250 332.500 333.750 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.714 341.429 342.143 342.857 343.571 344.286 345.000 345.000 345.000 345.000 346.000 347.000 348.000 349.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 365.000 365.000 365.000 365.714 366.429 367.143 367.857 368.571 369.286 370.000 370.714 371.429 372.143 372.857 373.571 374.286 375.000 375.833 376.667 377.500 378.333 379.167 380.000 382.500 385.000 385.000 385.000 387.500 390.000 390.000 391.250 392.500 393.750 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.406 415.898 416.505 417.275 418.283 419.659 421.650 424.785 430.452
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 57 57 0 54 0 57 0 0 0 66 60 0 66 0 51 0 0 66 63 63 66 69 69 69 69 66 69 0 0 0 0 57 57 0 0 0 0 0 0 0 0 69 54 0 0 0 66 69 72 0 0 0 0 0 0 75 78 81 78 0 0 0 0 69 63 66 69 69 72 0 0 0 0 54 57 60 0 0 0 0 0 0 0 0 0 0 0 63 0 66 0 66 0 66 0 69 0 66 66 69 60 66 63 0 0 0 54 66 57 0 0 69 57 63 0 72 60 63 48 72 63 66 0 0 69 69 69 66 0 0 0 66 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 1.171875 -2.734375 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="127">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.615 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.255 140.0 145.0 150.0 155.0 160.0 165.0 168.509 170.0 175.0 180.0 185.0 190.0 195.0 197.764 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 357.939 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.267 0.35 0.391 0.404 0.4 0.386 0.362 0.325 0.27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.245 0.28 0.315 0.35 0.385 0.404 0.469 0.572 0.668 0.765 0.869 0.98 1.102 1.236 1.382 1.543 1.719 1.912 2.12 2.346 2.588 2.847 3.121 3.411 3.717 4.038 4.374 4.726 5.093 5.476 5.876 6.292 6.724 7.171 7.626 8.074 8.478 8.75 8.8 8.794 8.735 8.62 8.457 8.255 8.022 7.764 7.488 7.2 6.903 6.603 6.303 6.005 5.711 5.424 5.145 4.874 4.614 4.363 4.122 3.893 3.673 3.465 3.266 3.078 2.899 2.73 2.57 2.419 2.276 2.141 2.014 1.894 1.781 1.675 1.574 1.48 1.391 1.307 1.229 1.155 1.085 1.02 0.958 0.9 0.846 0.795 0.747 0.701 0.659 0.619 0.582 0.546 0.513 0.482 0.453 0.426 0.4 0.376 0.353 0.331 0.311 0.292 0.275 0.258 0.242 0.228 0.214 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.404" PeakHeight="110.0" Num="3" Error="0.0">
-20.321 3.161 -0.225
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.404" EndFrequency="8.8" PeakHeight="357.939" Num="5" zHalfNm="324.179" Error="3.173">
-132.622 -42.189 16.243 -3.968 2.361
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.764" Depth="0.204"/>
<TopsideChapman PeakHeight="357.939" PeakDensity="960794.06" PeakScaleHeight="24.98" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
