<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 04:10:00.000"
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="14.0">
<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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.10.27 (300) 04:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630010270410009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.609" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.070" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.750" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="297.290" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="264.489" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="244.370" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.075" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="29.105" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.473" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="15.213" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="28.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 251.000 252.000 253.000 254.000 255.000 255.000 255.000 257.500 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 267.500 270.000 270.000 275.000 276.667 278.333 280.000 281.250 282.500 283.750 285.000 285.000 285.000 285.000 285.000 285.713 286.582 287.666 289.055 290.900 293.469 297.290 303.579 315.858 350.485
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
81 84 72 0 78 81 81 78 0 0 72 78 75 78 78 84 81 75 0 0 69 81 72 66 66 0 72 0 69 69 69 78 69 0 0 69 75 78 72 72 72 66 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 -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 -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 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="80">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.667 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.333 180.0 185.0 190.0 195.0 200.0 205.0 208.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 264.489 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0
</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 0.44 0.733 1.149 1.712 2.45 3.366 4.4 5.428 6.319 6.985 7.384 7.5 7.499 7.411 7.202 6.903 6.542 6.145 5.728 5.308 4.894 4.495 4.115 3.757 3.422 3.112 2.826 2.563 2.323 2.103 1.903 1.721 1.556 1.406 1.271 1.148 1.037 0.936 0.845 0.763 0.689 0.622 0.561 0.506 0.457 0.412 0.372 0.336 0.303 0.274 0.247 0.223 0.201

</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="7.5" PeakHeight="264.489" Num="5" zHalfNm="244.37" Error="0.877">
-58.048 2.491 -1.492 0.764 -0.204
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.0" Depth="0.154"/>
<TopsideChapman PeakHeight="264.489" PeakDensity="697890.8" PeakScaleHeight="15.213" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
