<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 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 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) 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">
FF202603502041120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.734" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.560" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.700" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" 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="2.761" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="326.801" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.772" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.083" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.105" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.914" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.149" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.720" 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" >
4.25 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 235.000 240.000 243.750 247.500 251.250 255.000 260.000 262.500 265.000 265.000 267.500 270.000 270.000 270.000 270.000 275.000 275.714 276.429 277.143 277.857 278.571 279.286 280.000 281.667 283.333 285.000 285.000 285.000 285.000 285.000 287.500 290.000 290.000 291.667 293.333 295.000 295.000 300.000 300.000 301.667 303.333 305.000 305.000 305.000 307.500 310.000 312.500 315.000 315.000 317.500 320.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 355.000 355.000 360.000 360.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 395.000 400.000 405.000 410.000 415.000 420.000 425.000 430.000 435.000 440.000 445.000 450.000 455.000 460.000 465.000 475.000 480.000 490.000 500.000 510.000 524.445 541.459 561.795 586.530
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 0 0 0 51 45 0 51 54 0 51 57 0 54 60 0 0 57 0 0 0 60 0 0 54 0 0 63 63 0 63 63 0 0 60 63 54 60 0 0 57 0 63 0 60 0 60 63 0 60 66 63 66 66 63 66 57 66 57 66 57 60 66 63 60 66 60 66 63 60 66 63 69 66 63 69 66 66 66 63 60 57 57 54 57 60 63 63 66 63 66 60 63 63 63 63 60 57 57 54 48
</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 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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" >
89.588 90.0 95.0 100.0 105.0 110.0 114.315 115.0 118.63 120.0 122.945 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 326.801 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.855 2.39 2.671 2.761 2.638 2.638 2.638 2.677 2.761 2.835 3.003 3.163 3.322 3.483 3.648 3.818 3.995 4.18 4.372 4.571 4.776 4.985 5.198 5.413 5.627 5.84 6.051 6.258 6.461 6.66 6.855 7.045 7.23 7.412 7.588 7.76 7.928 8.09 8.248 8.4 8.545 8.684 8.815 8.936 9.046 9.142 9.223 9.286 9.328 9.348 9.35 9.348 9.339 9.323 9.299 9.269 9.232 9.189 9.14 9.085 9.026 8.961 8.893 8.82 8.743 8.662 8.579 8.492 8.402 8.31 8.216 8.12 8.022 7.922 7.821 7.718 7.615 7.511 7.406 7.3 7.195 7.089 6.982 6.876 6.77 6.664 6.559 6.453 6.349 6.245 6.141 6.038 5.936 5.835 5.735 5.636 5.537 5.44 5.344 5.248 5.154 5.061 4.969 4.879 4.789 4.701 4.614 4.528 4.443 4.36 4.278 4.197 4.117 4.039 3.962 3.886 3.811 3.738 3.666 3.595 3.525 3.456 3.389 3.322 3.257 3.193 3.13 3.069 3.008 2.948 2.89 2.833 2.776 2.721 2.667 2.614 2.561 2.51 2.46 2.411 2.362 2.315 2.268 2.222 2.178 2.134 2.091 2.048 2.007 1.966 1.927 1.888 1.849 1.812 1.775 1.739 1.704 1.669 1.635 1.602 1.569 1.537 1.506 1.475 1.445 1.416 1.387 1.358 1.331 1.303 1.277 1.251 1.225 1.2 1.176 1.151 1.128 1.105 1.082 1.06 1.038 1.017 0.996 0.976 0.956 0.936

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.761" PeakHeight="110.0" Num="3" Error="0.0">
-29.981 12.391 -2.822
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.761" EndFrequency="9.35" PeakHeight="326.801" Num="5" zHalfNm="223.772" Error="4.8">
-190.796 -19.003 8.707 -4.909 2.145
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.945" Depth="0.123"/>
<TopsideChapman PeakHeight="326.801" PeakDensity="1084646.4" PeakScaleHeight="75.149" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
