<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 20:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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) 20:30:00</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">
FF202607903202030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.885" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.740" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" 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="1.838" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="331.765" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="273.693" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.629" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="81.440" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.108" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.184" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="172">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 266.667 268.333 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 271.250 272.500 273.750 275.000 275.000 275.000 275.000 275.000 276.667 278.333 280.000 281.667 283.333 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 297.500 300.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 306.429 307.857 309.286 310.714 312.143 313.571 315.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 327.500 330.000 330.000 330.000 331.000 332.000 333.000 334.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 361.000 362.000 363.000 364.000 365.000 366.000 367.000 368.000 369.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 381.667 383.333 385.000 385.000 385.000 385.000 387.500 390.000 395.000 392.500 390.000 392.500 395.000 395.000 400.000 405.000 405.833 406.667 407.500 408.333 409.167 410.000 410.000 410.000 412.500 415.000 420.000 425.000 427.759 430.982 434.797 439.382 444.997 452.034 461.110 473.263
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 0 60 63 0 66 60 66 66 66 66 60 66 69 69 66 0 0 60 63 63 0 0 0 0 0 69 69 0 0 72 66 0 0 0 66 60 63 0 54 0 0 63 0 45 63 60 60 0 66 66 66 66 66 69 69 0 0 69 69 69 69 60 69 69 0 0 0 0 0 0 54 63 0 0 54 60 0 66 72 0 60 66 0 57 63 66 0 69 0 0 69 57 63 69 72 75 63 69 69 75 72 69 69 72 0 63 69 75 0 72 75 75 72 75 75 0 0 48 54 0 0 0 0 0 72 75 72 72 75 75 63 0 69 75 0 0 69 0 72 69 66 69 54 0 69 0 66 69 60 48 0 0 42 51 0 60 63 60 0 60 0 48 0 0 0 0 0 0 0 0
</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 -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 -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 -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 -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 -0.390625 1.953125 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -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 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 1.953125 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 0.390625 -2.734375 -0.390625 -1.171875 1.953125 -2.734375 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="176">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.809 90.0 95.0 100.0 105.0 110.0 115.0 119.129 120.0 125.0 128.257 130.0 135.0 137.386 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 331.765 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.231 1.592 1.779 1.838 1.798 1.702 1.702 1.702 1.702 1.728 1.802 1.838 1.901 2.021 2.143 2.268 2.399 2.536 2.68 2.833 2.995 3.168 3.353 3.551 3.762 3.987 4.225 4.476 4.74 5.015 5.3 5.593 5.893 6.199 6.51 6.825 7.142 7.463 7.786 8.111 8.438 8.767 9.098 9.43 9.762 10.092 10.417 10.726 11.005 11.224 11.341 11.35 11.344 11.309 11.248 11.162 11.053 10.924 10.777 10.614 10.438 10.249 10.051 9.844 9.63 9.41 9.187 8.96 8.731 8.502 8.272 8.043 7.816 7.59 7.367 7.146 6.929 6.716 6.506 6.301 6.1 5.903 5.711 5.524 5.341 5.163 4.99 4.822 4.659 4.5 4.346 4.196 4.051 3.911 3.775 3.643 3.516 3.392 3.273 3.157 3.046 2.938 2.833 2.733 2.635 2.541 2.451 2.363 2.278 2.197 2.118 2.042 1.968 1.898 1.829 1.763 1.7 1.639 1.579 1.522 1.467 1.414 1.363 1.314 1.266 1.22 1.176 1.134 1.093 1.053 1.015 0.978 0.942 0.908 0.875 0.844 0.813 0.783 0.755 0.728 0.701 0.676 0.651 0.628 0.605 0.583 0.562 0.541 0.522 0.503 0.484 0.467 0.45 0.433 0.418 0.402 0.388 0.374 0.36 0.347 0.334 0.322 0.311 0.299 0.288 0.278 0.268 0.258 0.249 0.24 0.231 0.223 0.214 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.838" PeakHeight="110.0" Num="3" Error="0.0">
-28.801 10.762 -2.152
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.838" EndFrequency="11.35" PeakHeight="331.765" Num="5" zHalfNm="273.693" Error="2.633">
-153.242 -49.015 11.659 -6.037 2.256
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.386" Depth="0.136"/>
<TopsideChapman PeakHeight="331.765" PeakDensity="1598294.0" PeakScaleHeight="42.184" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
