<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 00:40:00.000"
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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</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) 00:40:00</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">
FF202604402130040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.142" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.680" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="0.750" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="355.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="333.941" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="294.023" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.442" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.997" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.521" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="30.084" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="57.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="20">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 370.000 367.500 365.000 363.889 362.778 361.667 360.556 359.444 358.333 357.222 356.111 355.000 360.000 368.152 378.317 391.346 408.647 432.734 468.575
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 63 57 0 51 57 0 0 57 57 51 51 54 57 54 54 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 -1.953125 -0.390625 -1.171875 -1.171875 0.390625 1.171875 -2.734375 0.390625 -2.734375 -2.734375 1.171875 -2.734375 -0.390625 -1.171875 0.390625 0.390625 -1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="131">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.298 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.595 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.893 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 333.941 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.315 0.291 0.259 0.214 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.231 0.253 0.274 0.295 0.316 0.337 0.354 0.373 0.478 0.612 0.777 0.973 1.201 1.46 1.752 2.075 2.43 2.813 3.221 3.649 4.088 4.529 4.962 5.376 5.759 6.1 6.389 6.619 6.783 6.877 6.9 6.899 6.874 6.816 6.73 6.619 6.487 6.338 6.175 6.001 5.818 5.63 5.437 5.242 5.046 4.851 4.658 4.467 4.28 4.097 3.919 3.745 3.577 3.415 3.258 3.107 2.961 2.822 2.687 2.559 2.436 2.318 2.205 2.098 1.995 1.897 1.804 1.715 1.63 1.549 1.472 1.398 1.329 1.262 1.199 1.139 1.082 1.028 0.976 0.927 0.88 0.836 0.794 0.754 0.716 0.68 0.646 0.613 0.582 0.553 0.525 0.498 0.473 0.449 0.426 0.405 0.384 0.365 0.347 0.329 0.312 0.297 0.282 0.267 0.254 0.241 0.229 0.217 0.206

</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="6.9" PeakHeight="333.941" Num="5" zHalfNm="294.023" Error="1.166">
-116.085 1.36 -0.209 0.141 -0.255
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.893" Depth="0.154"/>
<TopsideChapman PeakHeight="333.941" PeakDensity="590694.8" PeakScaleHeight="30.084" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
