<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 08:20:00.000"
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: 90% PACIFIC flags: 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" >
2026.02.12 (043) 08:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604302120820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="3.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.321" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.950" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="3.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="300.000" 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="0.393" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="279.710" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.045" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.096" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="64.438" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.684" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.725" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="52.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="37">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 237.500 240.000 241.429 242.857 244.286 245.714 247.143 248.571 250.000 245.000 245.000 248.333 251.667 255.000 260.000 260.000 265.000 265.000 270.000 270.000 275.000 275.000 280.000 280.000 290.000 295.000 295.000 300.000 310.000 315.000 325.000 335.000 349.903 369.576 396.749
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 0 54 0 0 0 0 0 0 54 69 0 0 0 69 63 69 63 66 63 69 63 69 69 75 72 69 69 69 69 69 66 66 66 0 54
</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 -1.171875 0.390625 0.390625 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="120">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.78 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.167 140.0 145.0 150.0 155.0 160.0 165.0 168.333 170.0 175.0 180.0 185.0 190.0 195.0 197.5 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 279.71 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.26 0.34 0.381 0.393 0.389 0.375 0.352 0.317 0.265 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.244 0.277 0.31 0.343 0.376 0.393 0.455 0.581 0.734 0.953 1.318 1.908 2.442 2.821 3.101 3.318 3.489 3.623 3.728 3.805 3.859 3.89 3.9 3.9 3.891 3.869 3.833 3.786 3.729 3.664 3.591 3.512 3.428 3.341 3.25 3.157 3.062 2.966 2.87 2.775 2.68 2.586 2.493 2.402 2.312 2.225 2.14 2.057 1.976 1.898 1.822 1.748 1.677 1.608 1.542 1.478 1.416 1.357 1.3 1.245 1.192 1.141 1.093 1.046 1.001 0.958 0.917 0.877 0.839 0.803 0.768 0.735 0.703 0.672 0.643 0.615 0.588 0.563 0.538 0.514 0.492 0.47 0.45 0.43 0.411 0.393 0.376 0.36 0.344 0.329 0.314 0.3 0.287 0.275 0.263 0.251 0.24 0.229 0.219 0.21 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.393" PeakHeight="110.0" Num="3" Error="0.0">
-20.023 3.009 -0.206
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.393" EndFrequency="3.9" PeakHeight="279.71" Num="5" zHalfNm="234.045" Error="1.217">
-99.832 28.312 -13.831 2.809 0.332
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.5" Depth="0.193"/>
<TopsideChapman PeakHeight="279.71" PeakDensity="188709.67" PeakScaleHeight="34.725" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
