<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-26 -299 08:00:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: 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" >
2026.10.26 (299) 08:00:00</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">
FF202629910260800009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.706" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.863" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="195.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="275.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.484" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="233.990" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="203.900" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.883" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="42.899" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.450" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.657" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="40.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="71">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 195.000 195.714 196.429 197.143 197.857 198.571 199.286 200.000 200.000 197.500 195.000 197.000 199.000 201.000 203.000 205.000 205.000 205.690 206.379 207.069 207.759 208.448 209.138 209.828 210.517 211.207 211.897 212.586 213.276 213.966 214.655 215.345 216.034 216.724 217.414 218.103 218.793 219.483 220.172 220.862 221.552 222.241 222.931 223.621 224.310 225.000 225.000 226.250 227.500 228.750 230.000 235.000 235.000 235.000 240.000 240.000 245.000 246.667 248.333 250.000 255.000 260.000 260.000 265.000 265.000 270.000 275.000 285.000 297.500 310.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 0 57 0 0 72 0 66 69 0 66 0 72 0 0 75 75 0 0 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57
</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 -0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 1.953125 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 0.390625 -0.390625 -1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="86">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.77 95.0 100.0 105.0 110.0 115.0 120.0 125.0 129.833 130.0 135.0 140.0 145.0 149.667 150.0 155.0 160.0 165.0 169.5 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 233.99 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.32 0.419 0.469 0.484 0.476 0.452 0.408 0.339 0.339 0.339 0.339 0.339 0.339 0.341 0.378 0.415 0.451 0.484 0.509 0.765 1.075 1.461 1.915 2.4 2.873 3.309 3.689 4.006 4.253 4.427 4.526 4.55 4.549 4.52 4.456 4.362 4.243 4.106 3.955 3.793 3.626 3.456 3.284 3.114 2.947 2.784 2.625 2.473 2.326 2.186 2.053 1.926 1.806 1.692 1.585 1.484 1.389 1.299 1.215 1.136 1.062 0.992 0.927 0.866 0.809 0.756 0.706 0.659 0.616 0.575 0.537 0.501 0.468 0.437 0.408 0.381 0.355 0.332 0.31 0.289 0.27 0.252 0.235 0.22 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.484" PeakHeight="110.0" Num="3" Error="0.0">
-22.031 4.171 -0.37
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.484" EndFrequency="4.55" PeakHeight="233.99" Num="5" zHalfNm="203.9" Error="1.114">
-71.114 8.173 -2.071 0.384 0.138
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="59.5" Depth="0.145"/>
<TopsideChapman PeakHeight="233.99" PeakDensity="256854.84" PeakScaleHeight="22.657" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
