<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-02 -275 08:50:00.000"
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="8.0">
<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="1 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 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" >
2026.10.02 (275) 08:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.37" 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">
FF202627510020850009039031101000005008000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="5.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.330" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.316" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.250" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.310" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="135.335" Name="h`E" 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="5.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="337.228" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.254" 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="255.258" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="206.674" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.505" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="65.193" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.705" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.316" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="20">
<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 5.3 5.35 5.4 5.45 5.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 297.273 299.545 301.818 304.091 306.364 308.636 310.909 313.182 315.455 317.727 320.000 323.698 327.762 332.248 337.228 342.785 349.028 356.092
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
24 15 0 0 0 0 0 0 0 0 0 0 36 0 21 0 0 0 12 0
</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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.25 1.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
135.335 151.465
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
9 9
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="121">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.032 95.0 100.0 105.0 110.0 115.0 120.0 123.321 125.0 130.0 135.0 136.643 140.0 145.0 149.964 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 255.258 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.874 1.135 1.268 1.31 1.287 1.217 1.14 1.14 1.14 1.14 1.14 1.183 1.247 1.31 1.311 1.5 1.687 1.891 2.117 2.365 2.624 2.883 3.134 3.373 3.6 3.818 4.028 4.23 4.427 4.62 4.808 4.991 5.166 5.324 5.447 5.5 5.5 5.49 5.459 5.41 5.344 5.264 5.171 5.067 4.955 4.835 4.71 4.58 4.447 4.312 4.176 4.039 3.902 3.767 3.633 3.501 3.371 3.244 3.119 2.998 2.88 2.766 2.654 2.547 2.442 2.342 2.244 2.151 2.06 1.973 1.889 1.809 1.731 1.657 1.586 1.517 1.452 1.389 1.328 1.27 1.215 1.162 1.111 1.062 1.015 0.971 0.928 0.887 0.848 0.81 0.775 0.74 0.708 0.676 0.646 0.618 0.59 0.564 0.539 0.515 0.492 0.471 0.45 0.43 0.411 0.392 0.375 0.358 0.342 0.327 0.313 0.299 0.285 0.273 0.261 0.249 0.238 0.227 0.217 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.31" PeakHeight="110.0" Num="3" Error="0.0">
-27.625 9.275 -1.618
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.31" EndFrequency="5.5" PeakHeight="255.258" Num="5" zHalfNm="206.674" Error="2.195">
-95.979 -16.001 10.441 -5.373 1.618
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="39.964" Depth="0.17"/>
<TopsideChapman PeakHeight="255.258" PeakDensity="375310.2" PeakScaleHeight="34.316" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
