<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 00:50:00.000"
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, 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" >
2026.10.24 (297) 00:50:00</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">
FF202629710240050009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.497" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.477" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="6.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="282.690" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="263.865" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.248" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="27.796" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.686" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="13.991" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="29.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="59">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 275.000 276.667 278.333 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.606 281.212 281.818 282.424 283.030 283.636 284.242 284.848 285.455 286.061 286.667 287.273 287.879 288.485 289.091 289.697 290.303 290.909 291.515 292.121 292.727 293.333 293.939 294.545 295.152 295.758 296.364 296.970 297.576 298.182 298.788 299.394 299.596 299.798 300.000 302.500 305.000 307.500 310.000 310.649 311.546 312.866 315.000 319.040 329.593
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 69 0 0 69 69 69 0 66 0 0 72 69 0 66 0 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 57 0 0 0 0 0 0 0 63 66 66 60 0 57 0 57 63 63 63 0 60 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 -0.390625 1.171875 0.390625 -0.390625 1.171875 -0.390625 1.171875 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 -0.390625 -0.390625 1.171875 -0.390625 1.171875 0.390625 0.390625 1.953125 0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 0.390625 -0.390625 0.390625 1.171875 1.171875 2.734375 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 1.171875 -0.390625 2.734375 -0.390625 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.171875 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="79">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.896 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.791 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.687 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 282.69 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0
</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 0.262 0.22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.226 0.247 0.268 0.289 0.309 0.33 0.351 0.354 0.548 0.842 1.242 1.746 2.329 2.971 3.657 4.377 5.119 5.852 6.505 6.933 7.0 6.982 6.834 6.57 6.225 5.83 5.41 4.984 4.564 4.159 3.776 3.419 3.087 2.782 2.504 2.25 2.02 1.813 1.625 1.456 1.305 1.168 1.046 0.936 0.838 0.75 0.671 0.6 0.537 0.48 0.43 0.384 0.344 0.307 0.275 0.246 0.22

</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="7.0" PeakHeight="282.69" Num="5" zHalfNm="263.865" Error="0.489">
-59.069 -5.786 4.085 -1.749 0.516
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.687" Depth="0.154"/>
<TopsideChapman PeakHeight="282.69" PeakDensity="607940.44" PeakScaleHeight="13.991" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
