<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 08:20:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.02.04 (035) 08:20:00</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">
FF202603502040820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="3.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.482" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.709" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="3.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="280.000" 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="0.404" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="264.129" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.237" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.095" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="52.300" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.922" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.095" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="44.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="41">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 231.667 233.333 235.000 236.667 238.333 240.000 241.667 243.333 245.000 245.000 250.000 251.667 253.333 255.000 256.667 258.333 260.000 260.000 260.000 260.000 265.000 265.000 270.000 270.000 275.000 280.000 280.000 290.000 295.000 305.000 318.012 339.467 381.529
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 0 0 66 63 60 0 0 0 63 0 0 0 0 63 75 63 0 0 0 0 0 60 66 75 78 72 75 69 72 69 66 63 69 69 66 57 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="101">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.615 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.0 140.0 145.0 150.0 155.0 160.0 165.0 166.0 170.0 175.0 180.0 185.0 190.0 194.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 264.129 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.267 0.35 0.391 0.404 0.399 0.384 0.358 0.317 0.254 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.229 0.266 0.302 0.338 0.375 0.404 0.426 0.567 0.77 1.068 1.487 1.974 2.413 2.764 3.035 3.244 3.402 3.518 3.596 3.639 3.65 3.65 3.635 3.601 3.55 3.484 3.407 3.319 3.224 3.123 3.017 2.909 2.798 2.687 2.577 2.467 2.359 2.253 2.15 2.05 1.952 1.858 1.768 1.68 1.597 1.516 1.439 1.366 1.296 1.229 1.165 1.104 1.046 0.991 0.939 0.89 0.842 0.798 0.755 0.715 0.677 0.641 0.606 0.574 0.543 0.514 0.486 0.46 0.435 0.412 0.39 0.369 0.349 0.33 0.312 0.295 0.279 0.264 0.25 0.237 0.224 0.212 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.404" PeakHeight="110.0" Num="3" Error="0.0">
-20.321 3.161 -0.225
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.404" EndFrequency="3.65" PeakHeight="264.129" Num="5" zHalfNm="227.237" Error="1.151">
-82.096 18.942 -8.49 1.751 -0.236
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="84.0" Depth="0.204"/>
<TopsideChapman PeakHeight="264.129" PeakDensity="165291.56" PeakScaleHeight="28.095" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
