<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 23:20:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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) 23:20:00</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">
FF202604602152320009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.854" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.683" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="435.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="435.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" 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="6.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="421.389" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="397.326" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.260" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="41.096" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.873" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.909" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="71.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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" >
460.000 456.667 453.333 450.000 448.333 446.667 445.000 445.000 444.167 443.333 442.500 441.667 440.833 440.000 445.000 450.000 450.000 450.000 450.000 450.000 445.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 447.500 450.000 455.000 450.000 451.000 452.000 453.000 454.000 455.000 455.000 453.333 451.667 450.000 450.000 450.000 450.000 450.000 447.500 445.000 442.500 440.000 437.500 435.000 435.000 435.000 437.500 440.000 438.333 436.667 435.000 440.000 440.000 440.000 443.333 446.667 450.000 455.000 455.000 455.000 455.000 460.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 462.500 460.000 460.000 457.500 455.000 455.000 460.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 457.500 455.000 455.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 51 0 0 54 48 0 0 0 0 63 63 0 54 0 0 54 54 54 51 57 57 63 0 57 57 0 57 54 57 0 0 0 0 57 54 0 0 57 0 66 60 63 0 0 0 0 0 60 54 54 0 57 0 0 51 57 0 54 0 0 54 51 51 57 60 0 51 0 0 0 0 0 0 0 57 0 51 54 54 54 57 60 57 51 51 0 0 0 54 57 0 54 54 60 0 51 0 51 51 57 48 54 54 51 51 0 51 54 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 1.171875 -1.953125 -1.171875 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -1.171875 1.171875 -1.171875 1.171875 1.953125 -1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 -0.390625 -0.390625 1.171875 1.171875 1.953125 0.390625 1.171875 1.953125 1.953125 0.390625 1.953125 1.171875 1.171875 -0.390625 2.734375 1.171875 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 2.734375 1.171875 1.953125 2.734375 0.390625 0.390625 0.390625 0.390625 2.734375 0.390625 1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 -1.171875 0.390625 2.734375 2.734375 1.953125 1.953125 2.734375 1.953125 1.171875 -0.390625 1.953125 -2.734375 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.953125 1.171875 0.390625 1.171875 1.171875 1.953125 -0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 -1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.953125 1.171875 0.390625 0.390625 1.171875 2.734375 1.171875 1.171875 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="121">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.286 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.573 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.859 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 421.389 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.31 0.283 0.245 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.229 0.251 0.274 0.296 0.319 0.341 0.354 0.379 0.456 0.566 0.699 0.835 0.969 1.099 1.226 1.352 1.478 1.604 1.73 1.858 1.988 2.12 2.254 2.391 2.532 2.676 2.823 2.975 3.131 3.293 3.459 3.632 3.81 3.996 4.189 4.391 4.601 4.822 5.054 5.299 5.558 5.835 6.131 6.452 6.804 7.195 7.643 8.184 8.952 9.35 9.314 9.161 8.908 8.58 8.199 7.783 7.346 6.901 6.458 6.022 5.601 5.197 4.812 4.448 4.107 3.787 3.488 3.211 2.953 2.715 2.494 2.291 2.103 1.93 1.771 1.625 1.491 1.367 1.254 1.15 1.054 0.966 0.886 0.812 0.744 0.682 0.625 0.573 0.525 0.482 0.441 0.405 0.371 0.34 0.311 0.285 0.262 0.24 0.22 0.201

</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="9.35" PeakHeight="421.389" Num="5" zHalfNm="397.326" Error="4.534">
-156.007 -92.31 51.923 -10.893 -1.243
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.859" Depth="0.154"/>
<TopsideChapman PeakHeight="421.389" PeakDensity="1084646.4" PeakScaleHeight="17.909" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
