<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 01:10:00.000"
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="15.0">
<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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Severe F-spread, F2x cusp not found, 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" >
2026.10.15 (288) 01:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628810150110009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.444" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.080" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="5.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.785" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="280.201" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.050" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.051" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="33.197" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.540" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.705" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="30.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 285.000 280.000 285.000 289.500 292.132 295.320 299.259 304.251 310.785 319.702 332.599 352.907 389.588
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 0 72 69 72 0 72 66 0 0 0 63 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.953125 -1.171875 -1.171875 -2.734375 -2.734375 -1.171875 -1.171875 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="85">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.158 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.315 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.473 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 280.201 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0
</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 0.334 0.317 0.294 0.264 0.223 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.203 0.224 0.244 0.265 0.286 0.306 0.327 0.348 0.354 0.469 0.724 1.06 1.479 2.01 2.675 3.418 4.098 4.62 4.974 5.18 5.25 5.25 5.214 5.111 4.955 4.76 4.537 4.296 4.046 3.793 3.542 3.297 3.061 2.835 2.621 2.42 2.231 2.054 1.89 1.737 1.596 1.465 1.345 1.234 1.131 1.037 0.951 0.871 0.798 0.731 0.67 0.614 0.562 0.515 0.471 0.432 0.395 0.362 0.331 0.303 0.278 0.254 0.233 0.213

</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="5.25" PeakHeight="280.201" Num="5" zHalfNm="257.05" Error="1.898">
-61.78 5.733 -3.878 1.937 -0.74
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.473" Depth="0.154"/>
<TopsideChapman PeakHeight="280.201" PeakDensity="341966.5" PeakScaleHeight="17.705" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
