<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 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" >
2026.02.13 (044) 09:00:00</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">
FF202604402130900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.259" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.012" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.700" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="317.189" 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="0.967" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="278.266" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.684" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="73.969" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.024" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.498" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="77.750" 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="37">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 265.000 265.000 265.000 262.500 260.000 265.000 270.000 280.000 280.000 282.500 285.000 280.000 280.000 280.000 290.000 290.000 290.000 290.000 290.000 291.709 293.615 295.752 298.167 300.916 304.075 307.743 312.052 317.189 323.416 331.121 340.902 353.729 371.286 396.781 437.170
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 57 0 60 0 57 60 69 60 57 0 63 63 0 66 57 51 51 75 75 63 0 72 72 0 63 66 0 0 51 0 0 66 69 63 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -1.953125 0.390625 1.171875 1.171875 -1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 1.171875 1.171875 -1.171875 -1.953125 1.953125 1.953125 2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="135">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.308 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.724 130.0 135.0 140.0 145.0 145.448 150.0 155.0 160.0 163.172 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 278.266 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.644 0.838 0.936 0.967 0.951 0.901 0.811 0.741 0.741 0.741 0.741 0.741 0.741 0.799 0.863 0.927 0.967 1.005 1.13 1.282 1.446 1.61 1.772 1.935 2.101 2.27 2.445 2.627 2.817 3.013 3.213 3.411 3.6 3.772 3.922 4.047 4.146 4.219 4.269 4.295 4.3 4.299 4.289 4.267 4.235 4.193 4.143 4.085 4.021 3.951 3.876 3.798 3.716 3.631 3.544 3.455 3.365 3.275 3.184 3.094 3.004 2.914 2.826 2.738 2.652 2.567 2.484 2.403 2.323 2.245 2.169 2.095 2.023 1.953 1.885 1.819 1.754 1.692 1.632 1.573 1.517 1.462 1.409 1.358 1.308 1.26 1.214 1.169 1.126 1.085 1.045 1.006 0.969 0.933 0.898 0.864 0.832 0.801 0.771 0.742 0.714 0.688 0.662 0.637 0.613 0.59 0.568 0.547 0.526 0.506 0.487 0.469 0.451 0.434 0.418 0.402 0.387 0.372 0.358 0.345 0.332 0.319 0.307 0.295 0.284 0.274 0.263 0.253 0.244 0.234 0.226 0.217 0.209 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.967" PeakHeight="110.0" Num="3" Error="0.0">
-26.355 7.842 -1.179
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.967" EndFrequency="4.3" PeakHeight="278.266" Num="5" zHalfNm="225.684" Error="2.581">
-113.729 -0.584 -1.898 2.586 -1.469
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="53.172" Depth="0.226"/>
<TopsideChapman PeakHeight="278.266" PeakDensity="229404.47" PeakScaleHeight="40.498" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
