<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 12:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o 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" >
2026.02.04 (035) 12:00:00</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">
FF202603502041200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.402" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.222" 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="9.550" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="395.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.973" 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="/" />
<Modeled Name="foF1p" Val="4.160" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="372.704" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.785" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.096" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="179.133" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.905" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="96.555" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="213.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 235.000 235.000 240.000 245.000 247.500 250.000 255.000 260.000 265.000 265.000 265.000 270.000 273.462 276.923 280.385 283.846 287.308 290.769 294.231 297.692 301.154 304.615 308.077 311.538 315.000 315.000 315.000 320.000 320.000 325.000 328.333 331.667 335.000 337.500 340.000 340.000 340.000 350.000 355.000 355.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 410.000 415.000 420.000 425.000 430.000 435.000 440.000 445.000 450.000 455.000 460.000 465.000 475.000 480.000 480.000 485.000 500.000 505.000 505.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 545.000 555.000 555.000 560.000 565.000 570.000 580.000 585.000 590.000 605.000 620.000 635.000 658.589 691.170
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 51 51 54 48 0 54 51 48 45 0 54 54 0 54 0 0 48 0 54 0 54 0 0 0 48 57 57 60 57 60 0 0 57 0 60 60 0 54 48 57 51 60 0 48 60 63 63 60 51 63 57 63 60 60 60 63 63 60 60 57 57 57 54 54 57 57 60 63 51 57 60 63 54 60 63 63 63 60 60 60 63 63 60 60 60 63 60 57 57 57 57 57 57 54 48 48
</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
</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" >
89.55 90.0 95.0 100.0 105.0 110.0 113.339 115.0 116.677 120.0 120.016 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.704 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.998 2.573 2.876 2.973 2.851 2.851 2.851 2.972 2.973 3.091 3.215 3.345 3.483 3.629 3.785 3.95 4.123 4.303 4.487 4.673 4.858 5.04 5.217 5.388 5.554 5.715 5.869 6.019 6.164 6.304 6.44 6.573 6.702 6.828 6.952 7.073 7.192 7.308 7.423 7.537 7.648 7.759 7.868 7.975 8.082 8.187 8.292 8.395 8.496 8.596 8.694 8.79 8.881 8.969 9.049 9.121 9.18 9.223 9.247 9.25 9.249 9.245 9.236 9.222 9.204 9.182 9.156 9.126 9.093 9.056 9.016 8.972 8.926 8.876 8.824 8.77 8.713 8.653 8.592 8.528 8.463 8.396 8.327 8.256 8.185 8.112 8.037 7.962 7.886 7.808 7.73 7.652 7.572 7.492 7.412 7.331 7.25 7.168 7.087 7.005 6.923 6.842 6.76 6.678 6.597 6.515 6.434 6.353 6.273 6.193 6.113 6.034 5.955 5.876 5.798 5.721 5.644 5.567 5.492 5.416 5.342 5.268 5.195 5.122 5.05 4.979 4.908 4.839 4.77 4.701 4.633 4.566 4.5 4.435 4.37 4.306 4.243 4.18 4.119 4.058 3.997 3.938 3.879 3.821 3.764 3.707 3.651 3.596 3.542 3.488 3.435 3.383 3.331 3.28 3.23 3.181 3.132 3.084 3.036 2.99 2.943 2.898 2.853 2.809 2.765 2.723 2.68 2.639 2.597 2.557 2.517 2.478 2.439 2.401 2.363 2.326 2.29 2.254 2.219 2.184 2.149 2.116 2.082 2.049 2.017 1.985

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.973" PeakHeight="110.0" Num="3" Error="0.0">
-30.172 12.669 -2.947
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.973" EndFrequency="9.25" PeakHeight="372.704" Num="5" zHalfNm="233.785" Error="3.76">
-232.574 -36.177 27.655 -14.549 2.957
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.016" Depth="0.122"/>
<TopsideChapman PeakHeight="372.704" PeakDensity="1061569.5" PeakScaleHeight="96.555" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
