<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.02.07 (038) 00:40:00</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">
FF202603802070040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="8.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.481" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.847" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="292.977" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.666" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.442" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="34.183" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.923" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.447" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="34.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.900" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="56">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.000 290.000 290.000 290.000 300.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 315.000 315.000 315.714 316.429 317.143 317.857 318.571 319.286 320.000 320.714 321.429 322.143 322.857 315.000 320.000 345.000 398.850
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 66 0 0 69 57 69 69 63 66 63 63 66 72 69 63 66 66 69 63 66 69 66 69 0 69 69 69 72 0 0 0 69 63 66 72 66 63 60 66 60 66 0 0 0 0 60 63 60 63 57 54 60 48 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 2.734375 -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 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 -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 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="92">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.244 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.488 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.732 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 292.977 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0
</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 0.211 0.232 0.253 0.274 0.296 0.317 0.338 0.354 0.394 0.582 0.833 1.171 1.606 2.137 2.753 3.436 4.17 4.935 5.708 6.454 7.122 7.645 7.949 8.0 7.99 7.884 7.683 7.41 7.084 6.723 6.341 5.951 5.561 5.178 4.807 4.452 4.114 3.795 3.496 3.216 2.956 2.714 2.491 2.285 2.094 1.919 1.758 1.609 1.473 1.349 1.234 1.129 1.033 0.945 0.864 0.791 0.723 0.661 0.605 0.553 0.506 0.463 0.423 0.387 0.354 0.323 0.296 0.27 0.247 0.226 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="8.0" PeakHeight="292.977" Num="5" zHalfNm="269.666" Error="1.049">
-72.168 -3.379 2.002 -1.054 0.354
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.732" Depth="0.154"/>
<TopsideChapman PeakHeight="292.977" PeakDensity="794044.7" PeakScaleHeight="17.447" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
