<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 10:40:00.000"
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" >
2026.02.03 (034) 10:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603402031040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.958" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.920" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="360.000" 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="2.476" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="306.997" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="217.809" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.803" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="124.477" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.633" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.039" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="121.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 230.000 230.000 230.000 230.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 252.500 255.000 255.000 260.000 260.000 260.000 255.000 255.000 256.000 257.000 258.000 259.000 260.000 261.000 262.000 263.000 264.000 265.000 266.250 267.500 268.750 270.000 271.250 272.500 273.750 275.000 276.667 278.333 280.000 277.500 275.000 277.500 280.000 282.500 285.000 285.000 285.000 290.000 290.000 291.667 293.333 295.000 300.000 300.000 302.500 305.000 305.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 370.000 375.000 380.000 380.000 385.000 390.000 394.916 400.484 406.842 414.172 422.716 432.801 444.887 459.635 478.031 501.622 532.969 576.650
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 51 57 54 54 0 0 48 51 0 48 54 54 60 66 0 63 60 0 48 60 57 60 0 60 54 0 0 0 57 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66 0 51 60 0 66 0 69 0 66 72 72 63 69 0 0 66 51 60 0 48 63 69 66 60 66 66 66 63 63 66 60 72 66 69 63 60 66 69 66 69 72 66 69 72 69 69 69 69 69 66 63 66 69 63 66 63 63 63 63 63 60 45 51
</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 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.645 90.0 95.0 100.0 105.0 110.0 115.0 115.701 120.0 121.402 125.0 127.103 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 306.997 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.662 2.144 2.396 2.476 2.38 2.351 2.351 2.351 2.43 2.476 2.583 2.749 2.905 3.06 3.217 3.379 3.549 3.728 3.919 4.124 4.345 4.582 4.836 5.106 5.39 5.682 5.978 6.272 6.559 6.835 7.098 7.346 7.578 7.794 7.993 8.177 8.344 8.494 8.629 8.747 8.848 8.932 9.0 9.05 9.083 9.099 9.1 9.098 9.088 9.069 9.041 9.006 8.963 8.912 8.856 8.793 8.724 8.65 8.571 8.488 8.4 8.308 8.214 8.116 8.015 7.912 7.806 7.699 7.59 7.48 7.368 7.256 7.143 7.029 6.915 6.801 6.687 6.573 6.459 6.345 6.233 6.12 6.009 5.898 5.789 5.68 5.572 5.465 5.36 5.256 5.153 5.051 4.951 4.852 4.754 4.658 4.563 4.47 4.378 4.287 4.198 4.111 4.025 3.94 3.857 3.776 3.696 3.617 3.54 3.464 3.39 3.317 3.245 3.175 3.106 3.039 2.973 2.908 2.844 2.782 2.721 2.661 2.603 2.546 2.489 2.434 2.381 2.328 2.276 2.226 2.176 2.128 2.081 2.034 1.989 1.945 1.901 1.859 1.817 1.776 1.737 1.698 1.66 1.622 1.586 1.55 1.516 1.482 1.448 1.416 1.384 1.353 1.322 1.292 1.263 1.235 1.207 1.18 1.153 1.127 1.102 1.077 1.052 1.029 1.005 0.983 0.96 0.939 0.917 0.897 0.876 0.857 0.837 0.818 0.8 0.782 0.764 0.747 0.73 0.713 0.697 0.681 0.666 0.651 0.636 0.622

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.476" PeakHeight="110.0" Num="3" Error="0.0">
-29.688 11.973 -2.64
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.476" EndFrequency="9.1" PeakHeight="306.997" Num="5" zHalfNm="217.809" Error="2.937">
-176.49 1.403 -7.125 0.838 1.48
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.103" Depth="0.125"/>
<TopsideChapman PeakHeight="306.997" PeakDensity="1027419.4" PeakScaleHeight="68.039" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
