<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread, 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" >
2026.02.05 (036) 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">
FF202603602050840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.295" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.911" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="6.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="337.328" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.626" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="319.062" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="300.625" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.661" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="28.610" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.333" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.113" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="10.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="87">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 320.000 317.500 315.000 320.000 320.000 322.500 325.000 327.500 330.000 350.000 370.000 370.000 368.333 366.667 365.000 365.000 365.000 365.000 362.500 360.000 355.000 350.000 345.000 350.000 345.000 345.000 342.500 340.000 337.500 335.000 335.000 330.000 327.500 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 335.000 332.500 330.000 327.500 325.000 325.000 330.000 327.500 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 325.000 325.000 325.000 320.000 317.500 315.000 317.500 320.000 322.500 325.000 325.000 325.000 327.179 329.830 333.125 337.328 342.879 350.547 361.830 380.073 414.583
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 0 57 60 60 0 0 0 57 0 63 60 0 0 63 54 63 60 60 63 0 63 63 63 60 57 54 0 0 57 57 54 0 54 0 0 66 0 0 0 0 54 57 69 0 66 66 63 0 63 63 0 0 63 0 0 0 60 0 60 60 0 0 0 0 0 0 66 54 0 54 0 0 66 66 63 60 54 63 51 0 0 0 0 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 -0.390625 1.171875 1.953125 1.953125 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 1.953125 1.953125 1.953125 2.734375 1.953125 2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="94">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.004 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.147 140.0 145.0 150.0 155.0 160.0 162.295 165.0 170.0 175.0 180.0 185.0 188.442 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 319.062 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.415 0.542 0.606 0.626 0.617 0.59 0.541 0.465 0.34 0.298 0.298 0.298 0.298 0.298 0.298 0.298 0.332 0.395 0.457 0.52 0.583 0.626 0.653 0.785 0.956 1.107 1.238 1.358 1.472 1.583 1.693 1.805 1.918 2.036 2.157 2.286 2.422 2.568 2.727 2.903 3.102 3.335 3.619 3.996 4.593 5.773 6.392 6.605 6.65 6.648 6.578 6.421 6.198 5.927 5.624 5.302 4.972 4.641 4.316 4.001 3.7 3.414 3.144 2.891 2.656 2.437 2.234 2.046 1.873 1.714 1.568 1.433 1.31 1.197 1.094 0.999 0.913 0.834 0.761 0.695 0.635 0.579 0.529 0.483 0.441 0.402 0.367 0.335 0.306 0.279 0.255 0.233 0.213

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.626" PeakHeight="110.0" Num="3" Error="0.0">
-23.956 5.59 -0.63
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.626" EndFrequency="6.65" PeakHeight="319.062" Num="5" zHalfNm="300.625" Error="6.544">
-96.856 -42.825 0.394 15.873 -7.206
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="78.442" Depth="0.328"/>
<TopsideChapman PeakHeight="319.062" PeakDensity="548666.25" PeakScaleHeight="17.113" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
