<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-08 -039 11:20:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.08 (039) 11:20:00</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">
FF202603902081120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.708" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.730" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="8.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.763" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="334.255" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.410" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.083" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="146.682" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.269" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.262" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.860" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 246.667 248.333 250.000 250.000 250.000 250.000 250.000 253.333 256.667 260.000 260.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 272.500 275.000 275.000 280.000 280.833 281.667 282.500 283.333 284.167 285.000 285.000 290.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 307.500 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 405.000 405.000 410.000 410.000 415.000 420.000 425.000 425.000 435.000 440.000 440.000 450.000 450.000 455.000 459.647 465.030 471.336 478.828 487.872 499.009 513.059 531.336 556.088 591.495 646.323
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 0 45 0 51 48 45 0 0 51 51 45 0 0 54 51 54 54 0 57 57 51 0 0 0 0 0 60 57 60 51 0 60 51 57 60 54 57 0 54 57 51 57 48 57 60 54 60 60 60 60 57 63 57 63 57 63 57 63 57 63 57 63 57 63 60 63 63 57 63 60 66 63 66 63 66 60 63 66 63 63 66 66 66 66 63 60 60 60 60 60 60 60 54 60 60 45 51 48 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 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" >
89.587 90.0 95.0 100.0 105.0 110.0 114.305 115.0 118.611 120.0 122.916 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 334.255 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.856 2.392 2.673 2.763 2.641 2.641 2.641 2.68 2.763 2.831 2.995 3.161 3.33 3.503 3.68 3.861 4.046 4.235 4.428 4.624 4.823 5.025 5.229 5.433 5.639 5.845 6.051 6.256 6.459 6.661 6.861 7.058 7.252 7.442 7.628 7.81 7.986 8.157 8.322 8.479 8.628 8.769 8.9 9.021 9.13 9.227 9.31 9.379 9.433 9.472 9.494 9.5 9.5 9.495 9.484 9.466 9.441 9.411 9.375 9.333 9.287 9.235 9.179 9.119 9.054 8.986 8.914 8.839 8.761 8.68 8.596 8.51 8.422 8.332 8.24 8.147 8.052 7.956 7.859 7.76 7.661 7.562 7.462 7.361 7.26 7.159 7.058 6.957 6.856 6.756 6.655 6.555 6.456 6.357 6.258 6.16 6.063 5.966 5.871 5.776 5.682 5.589 5.496 5.405 5.315 5.225 5.137 5.049 4.963 4.878 4.794 4.711 4.629 4.548 4.468 4.389 4.312 4.235 4.16 4.086 4.012 3.94 3.869 3.8 3.731 3.663 3.596 3.531 3.466 3.403 3.34 3.279 3.219 3.159 3.101 3.043 2.987 2.931 2.877 2.823 2.771 2.719 2.668 2.618 2.569 2.521 2.474 2.427 2.381 2.337 2.292 2.249 2.207 2.165 2.124 2.084 2.044 2.006 1.968 1.93 1.894 1.858 1.822 1.788 1.754 1.72 1.687 1.655 1.624 1.593 1.562 1.533 1.503 1.475 1.446 1.419 1.392 1.365 1.339 1.313 1.288 1.263 1.239 1.215 1.192 1.169

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.763" PeakHeight="110.0" Num="3" Error="0.0">
-29.983 12.394 -2.824
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.763" EndFrequency="9.5" PeakHeight="334.255" Num="5" zHalfNm="226.41" Error="1.175">
-204.169 -10.215 3.955 -1.375 0.465
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.916" Depth="0.122"/>
<TopsideChapman PeakHeight="334.255" PeakDensity="1119727.0" PeakScaleHeight="80.262" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
