<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-02 -275 05:25:00.000"
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="8.0">
<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: 75% PACIFIC flags: Moderate F-spread, Multiple candidates for F2o cusp, 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" >
2026.10.02 (275) 05:25:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.37" 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">
FF202627510020525009039031101000005008000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="3.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.636" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.273" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.450" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="260.000" 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="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="266.501" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.139" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.660" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="45.791" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.233" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="25.076" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="34.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="6.080" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 253.333 256.667 260.000 270.000 280.000 295.292 320.325 368.752
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
39 21 0 0 9 30 0 0 0
</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
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.667 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.333 180.0 185.0 190.0 195.0 200.0 205.0 208.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 266.501 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.306 0.275 0.231 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.246 0.269 0.293 0.316 0.34 0.354 0.488 0.66 0.861 1.165 1.718 2.267 2.587 2.791 2.929 3.02 3.075 3.099 3.1 3.094 3.068 3.022 2.961 2.887 2.802 2.71 2.612 2.51 2.405 2.3 2.195 2.09 1.988 1.888 1.79 1.696 1.605 1.518 1.435 1.355 1.279 1.206 1.137 1.072 1.01 0.951 0.895 0.843 0.793 0.746 0.702 0.661 0.621 0.584 0.549 0.517 0.486 0.457 0.429 0.403 0.379 0.356 0.335 0.315 0.296 0.278 0.261 0.246 0.231 0.217 0.204

</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="3.1" PeakHeight="266.501" Num="5" zHalfNm="234.139" Error="3.777">
-71.926 19.766 -10.946 4.605 0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.0" Depth="0.154"/>
<TopsideChapman PeakHeight="266.501" PeakDensity="119230.766" PeakScaleHeight="25.076" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
