<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 18:40:00.000"
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" >
2026.02.06 (037) 18:40:00</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">
FF202603702061840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.497" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.847" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" 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="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" 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="2.886" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.816" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.261" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.587" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.276" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.056" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.700" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="177.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 205.000 205.000 213.333 221.667 230.000 230.000 230.833 231.667 232.500 233.333 234.167 235.000 240.000 245.000 245.000 250.000 255.000 260.000 265.000 270.000 275.000 280.000 280.000 285.000 290.000 295.000 297.500 300.000 300.000 305.000 310.000 310.000 310.000 311.667 313.333 315.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 382.500 385.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 510.000 515.000 515.000 520.000 530.000 535.000 540.000 550.000 559.667 570.690 583.378 598.138 615.522 636.300 661.571
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 51 48 0 51 48 0 48 0 51 0 57 51 60 60 0 60 51 0 0 0 48 54 54 54 51 0 54 57 60 57 63 60 0 0 57 63 63 0 66 0 0 0 63 63 63 60 54 54 0 0 57 60 57 57 60 0 60 54 0 60 57 57 60 57 0 0 0 60 66 66 63 54 57 60 45 51 60 51 0 48 60 51 60 66 60 48 57 66 63 54 63 63 63 60 66 63 63 63 60 63 63 60 63 63 57 57 51 63 60 63 63 63 63 63 63 60 57 57 57 54 54 54 54 54 54 51 51 51 54 51 0 0 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -2.734375 -0.390625 0.390625 -2.734375 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 2.734375 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -1.171875 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" >
89.564 90.0 95.0 100.0 105.0 110.0 113.733 115.0 117.467 120.0 121.2 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.816 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.94 2.498 2.792 2.886 2.764 2.764 2.764 2.847 2.886 2.998 3.135 3.267 3.396 3.526 3.656 3.788 3.924 4.062 4.205 4.352 4.504 4.66 4.821 4.987 5.157 5.331 5.508 5.688 5.871 6.055 6.24 6.426 6.611 6.796 6.981 7.164 7.345 7.525 7.703 7.879 8.053 8.225 8.394 8.561 8.725 8.886 9.044 9.198 9.348 9.493 9.632 9.764 9.888 10.003 10.105 10.192 10.263 10.314 10.343 10.35 10.35 10.345 10.332 10.314 10.289 10.258 10.221 10.178 10.131 10.078 10.021 9.96 9.894 9.824 9.751 9.674 9.594 9.511 9.426 9.338 9.247 9.155 9.06 8.964 8.866 8.767 8.667 8.565 8.462 8.359 8.255 8.151 8.046 7.94 7.835 7.729 7.624 7.518 7.413 7.308 7.203 7.099 6.995 6.892 6.789 6.687 6.586 6.485 6.385 6.286 6.188 6.09 5.994 5.898 5.804 5.71 5.618 5.526 5.436 5.346 5.258 5.171 5.085 4.999 4.915 4.833 4.751 4.67 4.591 4.512 4.435 4.359 4.284 4.21 4.137 4.065 3.994 3.924 3.856 3.788 3.722 3.656 3.592 3.528 3.466 3.404 3.344 3.284 3.226 3.169 3.112 3.056 3.002 2.948 2.895 2.843 2.792 2.742 2.692 2.644 2.596 2.549 2.503 2.458 2.413 2.369 2.326 2.284 2.243 2.202 2.162 2.122 2.084 2.046 2.009 1.972 1.936 1.901 1.866 1.832 1.798 1.765 1.733 1.701 1.67 1.64

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.886" PeakHeight="110.0" Num="3" Error="0.0">
-30.098 12.559 -2.897
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.886" EndFrequency="10.35" PeakHeight="373.816" Num="5" zHalfNm="259.261" Error="6.718">
-224.29 -37.337 11.618 -5.157 2.55
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.2" Depth="0.122"/>
<TopsideChapman PeakHeight="373.816" PeakDensity="1329063.2" PeakScaleHeight="83.7" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
