<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 08:40:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.02.06 (037) 08:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603702060840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.117" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.689" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="275.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.623" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="306.465" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.381" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.661" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.749" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.652" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.535" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.540" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.840" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="25">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 260.000 261.667 263.333 265.000 266.667 268.333 270.000 275.000 335.000 338.333 339.906 341.750 343.941 346.587 349.848 353.965 359.326 366.597 377.017 393.199 421.750 485.618
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 69 66 0 0 72 0 66 72 72 54 0 57 60 54 0 0 57 60 54 60 57 54 48
</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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.015 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.187 140.0 145.0 150.0 155.0 160.0 162.374 165.0 170.0 175.0 180.0 185.0 188.561 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 306.465 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.413 0.54 0.603 0.623 0.614 0.587 0.539 0.463 0.339 0.296 0.296 0.296 0.296 0.296 0.296 0.296 0.329 0.391 0.454 0.516 0.579 0.623 0.657 0.768 0.883 1.011 1.162 1.346 1.573 1.843 2.13 2.4 2.635 2.836 3.006 3.151 3.274 3.379 3.469 3.544 3.606 3.656 3.695 3.724 3.742 3.75 3.75 3.748 3.74 3.725 3.705 3.678 3.647 3.612 3.572 3.528 3.481 3.431 3.378 3.323 3.267 3.208 3.148 3.087 3.025 2.963 2.9 2.836 2.773 2.71 2.647 2.584 2.522 2.46 2.399 2.338 2.279 2.22 2.162 2.105 2.049 1.994 1.94 1.887 1.836 1.785 1.735 1.687 1.639 1.593 1.548 1.504 1.461 1.419 1.378 1.338 1.299 1.261 1.225 1.189 1.154 1.12 1.087 1.055 1.024 0.993 0.964 0.935 0.907 0.88 0.854 0.829 0.804 0.78 0.756 0.734 0.712 0.69 0.669 0.649 0.63 0.611 0.592 0.574 0.557 0.54 0.524 0.508 0.493 0.478 0.463 0.449 0.436 0.423 0.41 0.397 0.385 0.374 0.362 0.351 0.341 0.33 0.32 0.31 0.301 0.292 0.283 0.274 0.266 0.258 0.25 0.243 0.235 0.228 0.221 0.214 0.208 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.623" PeakHeight="110.0" Num="3" Error="0.0">
-23.924 5.564 -0.625
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.623" EndFrequency="3.75" PeakHeight="306.465" Num="5" zHalfNm="240.381" Error="4.995">
-137.527 30.059 -13.592 2.791 0.365
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="78.561" Depth="0.327"/>
<TopsideChapman PeakHeight="306.465" PeakDensity="174472.7" PeakScaleHeight="50.535" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
