<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 23:40:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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) 23:40:00</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">
FF202604402132340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.948" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.729" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="320.000" 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="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="348.071" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="302.940" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.064" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="64.152" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.772" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.454" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="53.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.920" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 397.500 395.000 400.000 380.000 360.000 360.000 360.000 360.000 360.000 345.000 330.000 325.000 320.000 317.500 315.000 310.000 310.000 310.000 307.500 305.000 303.333 301.667 300.000 305.000 303.333 301.667 300.000 305.000 306.667 308.333 310.000 305.000 306.250 307.500 308.750 310.000 310.000 305.000 305.625 306.250 306.875 307.500 308.125 308.750 309.375 310.000 310.000 310.000 310.000 310.172 310.345 310.517 310.690 310.862 311.034 311.207 311.379 311.552 311.724 311.897 312.069 312.241 312.414 312.586 312.759 312.931 313.103 313.276 313.448 313.621 313.793 313.966 314.138 314.310 314.483 314.655 314.828 315.000 325.000 325.000 320.000 320.000 340.000 343.333 346.667 350.000 353.667 357.333 361.000 364.667 368.333 372.000 375.667 379.333 383.000 386.667 390.333 394.000 397.667 401.333 404.898 409.168 414.373 420.859 429.168 440.189 455.514 478.272
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51 57 60 57 54 0 57 54 0 51 0 57 0 57 51 0 57 0 63 0 0 0 60 0 0 57 51 0 0 60 66 0 0 0 57 51 63 0 0 54 57 0 0 0 60 0 57 54 0 0 0 0 0 0 0 57 0 0 0 0 0 0 0 54 0 0 0 0 0 60 57 57 54 54 54 51 51 54 51 54 51 51 0 0 48 48 0 0 0 0 0 0 0 0 0 51 0 0 48 51 48 0 48 51 48 0 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 1.171875 1.171875 0.390625 0.390625 1.171875 -0.390625 -2.734375 1.171875 -2.734375 1.171875 0.390625 1.171875 0.390625 1.171875 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 -0.390625 -0.390625 0.390625 1.171875 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 -2.734375 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 -0.390625 1.171875 0.390625 1.953125 1.953125 0.390625 -2.734375 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -2.734375 -0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 -0.390625 -0.390625 0.390625 0.390625 0.390625 -1.953125 1.171875 2.734375 1.953125 -1.953125 -2.734375 -0.390625 -1.171875 2.734375 2.734375 1.953125 2.734375 2.734375 -2.734375 -2.734375 -1.953125 1.171875 1.953125 -0.390625 1.953125 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="151">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.921 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.842 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.763 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 348.071 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.223 0.245 0.267 0.289 0.311 0.333 0.354 0.356 0.419 0.52 0.662 0.82 0.979 1.142 1.311 1.49 1.684 1.899 2.141 2.42 2.751 3.16 3.686 4.379 5.215 5.993 6.589 7.029 7.357 7.602 7.785 7.914 7.999 8.043 8.05 8.048 8.021 7.967 7.889 7.789 7.67 7.534 7.385 7.223 7.053 6.874 6.69 6.501 6.31 6.116 5.923 5.729 5.537 5.347 5.159 4.975 4.793 4.616 4.443 4.275 4.11 3.951 3.796 3.646 3.501 3.361 3.225 3.094 2.968 2.847 2.729 2.617 2.508 2.404 2.303 2.207 2.114 2.025 1.94 1.858 1.779 1.704 1.632 1.562 1.496 1.432 1.371 1.313 1.257 1.203 1.151 1.102 1.055 1.01 0.966 0.925 0.885 0.847 0.811 0.776 0.743 0.711 0.68 0.651 0.623 0.596 0.57 0.546 0.522 0.5 0.478 0.458 0.438 0.419 0.401 0.384 0.367 0.352 0.336 0.322 0.308 0.295 0.282 0.27 0.258 0.247 0.236 0.226 0.217 0.207

</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="8.05" PeakHeight="348.071" Num="5" zHalfNm="302.94" Error="8.699">
-135.068 10.296 -16.194 13.206 -5.548
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.763" Depth="0.154"/>
<TopsideChapman PeakHeight="348.071" PeakDensity="804001.25" PeakScaleHeight="35.454" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
