<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 05:20:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.15 (046) 05:20:00</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">
FF202604602150520009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.483" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.124" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="290.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="271.101" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.076" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.598" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="62.360" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.676" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.435" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="51.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 215.000 215.000 215.000 215.000 215.000 215.000 217.500 220.000 220.000 225.000 225.000 224.167 223.333 222.500 221.667 220.833 220.000 220.000 220.000 220.000 220.000 220.000 220.000 221.429 222.857 224.286 225.714 227.143 228.571 230.000 225.000 225.000 225.000 225.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 237.500 240.000 240.000 237.500 235.000 240.000 242.500 245.000 245.000 245.000 245.000 245.000 243.333 241.667 240.000 242.500 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 275.000 275.000 275.000 280.000 280.000 285.000 285.000 290.000 290.000 293.584 297.742 302.625 308.438 315.476 324.173 335.193 349.610 369.281 397.717 442.458
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 69 0 0 69 60 57 0 69 69 60 0 0 0 0 0 0 72 69 69 69 69 72 72 0 0 0 0 0 0 57 72 0 60 69 60 0 0 0 72 72 75 75 0 57 75 75 75 0 0 66 66 0 0 69 69 0 0 72 75 0 72 72 0 66 69 0 72 72 54 57 60 60 0 66 0 0 72 0 72 57 75 63 0 66 0 72 72 0 63 66 69 51 75 75 75 66 69 72 72 75 66 69 72 75 72 69 75 75 69 75 75 72 75 72 75 72 75 75 72 72 72 69 66 66 66 0 54 45
</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 -0.390625 -0.390625 -0.390625 -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 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="132">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.5 135.0 140.0 145.0 150.0 155.0 159.0 160.0 165.0 170.0 175.0 180.0 183.5 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 271.101 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.333 0.306 0.262 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.238 0.269 0.301 0.332 0.354 0.377 0.493 0.722 1.156 1.833 2.771 3.883 4.935 5.807 6.506 7.065 7.514 7.872 8.152 8.365 8.516 8.61 8.649 8.65 8.639 8.594 8.517 8.413 8.284 8.135 7.968 7.786 7.593 7.39 7.18 6.964 6.746 6.525 6.304 6.084 5.866 5.651 5.438 5.23 5.027 4.828 4.635 4.446 4.264 4.087 3.916 3.751 3.592 3.438 3.29 3.148 3.011 2.88 2.753 2.632 2.516 2.405 2.298 2.196 2.098 2.004 1.914 1.828 1.746 1.667 1.592 1.52 1.452 1.386 1.323 1.263 1.206 1.151 1.099 1.049 1.002 0.956 0.913 0.871 0.831 0.794 0.758 0.723 0.69 0.659 0.629 0.6 0.573 0.547 0.522 0.498 0.475 0.453 0.433 0.413 0.394 0.376 0.359 0.343 0.327 0.312 0.298 0.284 0.271 0.259 0.247 0.236 0.225 0.215 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.65" PeakHeight="271.101" Num="5" zHalfNm="227.076" Error="2.458">
-107.614 32.682 -14.862 3.66 -1.467
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="73.5" Depth="0.154"/>
<TopsideChapman PeakHeight="271.101" PeakDensity="928318.9" PeakScaleHeight="33.435" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
