<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o 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</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) 23:40:00</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">
FF202603702062340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.132" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.547" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="7.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="390.000" 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="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="351.939" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="330.626" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.064" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="35.132" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.767" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="14.882" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="52.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="63">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 350.000 360.000 345.000 340.000 425.000 425.000 420.000 410.000 410.000 415.000 420.000 418.333 416.667 415.000 413.333 411.667 410.000 408.333 406.667 405.000 405.000 405.000 405.000 405.000 402.500 400.000 400.000 405.000 405.000 402.500 400.000 397.500 395.000 392.500 390.000 390.000 385.000 380.000 380.000 380.000 380.000 375.000 370.000 365.000 360.000 360.000 361.875 363.750 365.625 367.500 369.375 371.250 373.125 375.000 376.875 378.750 380.625 382.500 384.375 386.250 388.125 390.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 54 57 63 51 51 54 51 57 57 54 0 63 57 60 0 0 0 54 60 57 63 66 57 0 54 60 57 60 60 66 0 54 60 63 63 69 63 63 0 66 0 0 57 57 60 0 57 54 63 57 54 57 57 57 54 0 66 63 63 63 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.171875 -1.171875 -1.171875 1.171875 1.171875 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 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 1.171875 0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 1.171875 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 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="96">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.856 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.711 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.567 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 351.939 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0
</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 0.285 0.249 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.223 0.245 0.268 0.29 0.312 0.334 0.354 0.361 0.454 0.566 0.704 0.87 1.057 1.256 1.459 1.664 1.868 2.072 2.276 2.48 2.686 2.895 3.106 3.322 3.542 3.769 4.003 4.246 4.501 4.768 5.054 5.363 5.705 6.102 6.623 7.2 7.172 7.017 6.759 6.428 6.05 5.646 5.234 4.825 4.428 4.049 3.691 3.358 3.048 2.763 2.501 2.262 2.043 1.845 1.665 1.502 1.354 1.221 1.1 0.991 0.893 0.805 0.725 0.653 0.588 0.529 0.477 0.429 0.387 0.348 0.313 0.282 0.254 0.229 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="7.2" PeakHeight="351.939" Num="5" zHalfNm="330.626" Error="9.126">
-104.702 -58.146 37.556 -14.92 2.84
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.567" Depth="0.154"/>
<TopsideChapman PeakHeight="351.939" PeakDensity="643176.2" PeakScaleHeight="14.882" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
