<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-19 -292 02:20:00.000"
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="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 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, Multiple candidates for F2x 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" >
2026.10.19 (292) 02:20:00</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">
FF202629210190220009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.944" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.591" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="256.376" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="241.036" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.435" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.189" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="17.352" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.838" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="19.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="54">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
246.250 247.500 248.750 250.000 255.000 255.000 260.000 260.000 259.000 258.000 257.000 256.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 250.000 248.125 246.250 244.375 242.500 240.625 238.750 236.875 235.000 235.000 235.000 235.000 240.000 240.000 242.500 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 255.000 255.000 255.000 260.000 255.000 256.376 260.000 295.871
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 69 69 69 75 69 69 66 66 0 63 63 66 66 69 0 0 63 69 72 66 0 0 0 0 0 69 75 87 81 75 84 69 0 75 78 81 78 81 75 81 72 75 66 72 69 72 66 0 0 75 72 69 0
</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 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 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 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="62">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.167 140.0 145.0 150.0 155.0 160.0 165.0 168.333 170.0 175.0 180.0 185.0 190.0 195.0 197.5 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 241.036 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.35 0.34 0.321 0.292 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.235 0.262 0.288 0.314 0.341 0.354 0.471 0.925 1.578 2.331 3.185 4.157 5.256 6.416 7.219 7.25 7.159 6.833 6.356 5.8 5.217 4.643 4.099 3.598 3.144 2.739 2.379 2.064 1.787 1.547 1.337 1.156 0.998 0.862 0.744 0.642 0.554 0.478 0.413 0.356 0.307 0.265 0.229

</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="7.25" PeakHeight="241.036" Num="5" zHalfNm="229.435" Error="1.825">
-39.489 -6.674 4.127 -1.461 -0.039
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.5" Depth="0.154"/>
<TopsideChapman PeakHeight="241.036" PeakDensity="652140.2" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
