<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 09:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.10.27 (300) 09:50:00</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">
FF202630010270950009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.667" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.219" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="292.137" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.298" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="223.561" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="183.412" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.231" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="47.494" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.000" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="27.138" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="43">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.331 285.728 286.211 286.814 287.585 288.607 290.028 292.137 295.590 302.279
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 78 78 75 75 75 72 72 81 81 81 81 84 84 84 81 81 84 0 84 84 84 84 84 84 81 81 84 84 84 84 84 81 84 87 87 84 81 81 84 84 78 60
</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 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="103">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.684 90.0 95.0 100.0 105.0 110.0 115.0 116.612 120.0 123.225 125.0 129.837 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 223.561 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.542 1.99 2.224 2.298 2.226 2.171 2.171 2.171 2.205 2.298 2.306 2.588 2.914 3.225 3.507 3.764 4.006 4.237 4.462 4.684 4.904 5.127 5.353 5.585 5.827 6.082 6.355 6.655 6.986 7.15 7.148 7.113 7.037 6.927 6.787 6.624 6.441 6.243 6.034 5.817 5.595 5.37 5.146 4.922 4.702 4.486 4.275 4.069 3.87 3.678 3.493 3.315 3.144 2.98 2.824 2.675 2.533 2.397 2.269 2.146 2.03 1.919 1.815 1.716 1.621 1.532 1.448 1.368 1.292 1.221 1.153 1.089 1.029 0.972 0.918 0.867 0.818 0.773 0.73 0.689 0.651 0.614 0.58 0.548 0.517 0.488 0.461 0.435 0.411 0.388 0.366 0.346 0.326 0.308 0.291 0.275 0.259 0.245 0.231 0.218 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.298" PeakHeight="110.0" Num="3" Error="0.0">
-29.478 11.679 -2.517
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.298" EndFrequency="7.15" PeakHeight="223.561" Num="5" zHalfNm="183.412" Error="1.873">
-72.265 -33.882 15.726 -2.834 -0.469
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.837" Depth="0.127"/>
<TopsideChapman PeakHeight="223.561" PeakDensity="634274.2" PeakScaleHeight="27.138" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
