<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 09:00:00.000"
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: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.01.31 (031) 09:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603101310900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.060" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.147" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="387.411" 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="1.004" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.160" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.286" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.494" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.425" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.082" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.438" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="88.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="62">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 260.000 260.000 260.000 260.455 260.909 261.364 261.818 262.273 262.727 263.182 263.636 264.091 264.545 265.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 267.500 270.000 270.000 270.000 270.000 270.000 270.000 270.000 278.333 286.667 295.000 305.000 305.000 305.000 305.000 310.000 315.000 320.000 320.000 320.000 327.500 335.000 339.286 343.571 347.857 352.143 356.429 360.714 365.000 365.000 367.500 370.404 374.245 379.563 387.411 400.159 424.482 489.248
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 66 66 69 66 0 0 0 0 0 0 0 0 0 0 66 81 0 72 66 66 0 69 72 0 0 0 69 0 72 0 72 63 60 57 51 0 54 60 63 60 54 51 51 48 51 57 0 0 0 0 0 51 60 54 57 57 57 0 0 51 0
</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 1.171875 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 1.171875 0.390625 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 1.953125 1.953125 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="157">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.266 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.866 130.0 135.0 140.0 143.731 145.0 150.0 155.0 160.0 160.597 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.16 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.668 0.87 0.972 1.004 0.987 0.935 0.842 0.794 0.794 0.794 0.794 0.794 0.81 0.872 0.934 0.997 1.004 1.121 1.23 1.335 1.444 1.561 1.69 1.833 1.993 2.172 2.369 2.578 2.793 3.006 3.214 3.412 3.602 3.781 3.952 4.112 4.263 4.403 4.532 4.649 4.75 4.833 4.896 4.936 4.95 4.95 4.945 4.929 4.904 4.87 4.827 4.778 4.721 4.659 4.591 4.519 4.443 4.363 4.281 4.196 4.109 4.02 3.931 3.84 3.75 3.659 3.568 3.477 3.387 3.298 3.21 3.122 3.036 2.951 2.868 2.786 2.705 2.626 2.549 2.473 2.4 2.327 2.257 2.188 2.121 2.056 1.992 1.93 1.87 1.811 1.754 1.699 1.645 1.593 1.542 1.493 1.445 1.399 1.354 1.31 1.268 1.227 1.187 1.149 1.112 1.076 1.041 1.007 0.974 0.942 0.911 0.881 0.853 0.825 0.798 0.772 0.746 0.722 0.698 0.675 0.653 0.631 0.611 0.591 0.571 0.552 0.534 0.517 0.5 0.483 0.467 0.452 0.437 0.422 0.408 0.395 0.382 0.369 0.357 0.345 0.334 0.323 0.312 0.302 0.292 0.282 0.273 0.264 0.255 0.247 0.239 0.231 0.223 0.216 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.004" PeakHeight="110.0" Num="3" Error="0.0">
-26.523 8.015 -1.226
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.004" EndFrequency="4.95" PeakHeight="300.16" Num="5" zHalfNm="237.286" Error="5.566">
-133.967 -6.224 0.82 -2.509 2.317
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.597" Depth="0.21"/>
<TopsideChapman PeakHeight="300.16" PeakDensity="304001.25" PeakScaleHeight="46.438" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
