<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-13 -286 22:20:00.000"
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, 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" >
2026.10.13 (286) 22:20:00</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">
FF202628610132220009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.109" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.830" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="379.912" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="341.247" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="315.514" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.284" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="40.457" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.849" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="18.527" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="52.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 380.000 378.750 377.500 376.250 375.000 373.750 372.500 371.250 370.000 370.000 369.643 369.286 368.929 368.571 368.214 367.857 367.500 367.143 366.786 366.429 366.071 365.714 365.357 365.000 364.643 364.286 363.929 363.571 363.214 362.857 362.500 362.143 361.786 361.429 361.071 360.714 360.357 360.000 362.500 365.000 369.167 373.333 373.433 373.545 373.670 373.812 373.974 374.161 374.379 374.635 374.943 375.317 375.784 376.382 377.175 378.276 379.912 382.591 387.786 402.167
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 0 0 0 0 0 0 0 0 66 0 0 0 0 60 0 0 0 63 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 60 0 0 60 0 0 54 0 0 0 0 0 0 0 60 57 57 0 0 60 54 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.953125 -0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 1.953125 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 1.953125 0.390625 1.953125 1.953125 1.171875 2.734375 1.171875 1.171875 0.390625 1.953125 1.171875 1.171875 1.953125 -1.171875 -0.390625 -1.171875 -1.171875 1.953125 1.953125 0.390625 2.734375 2.734375 -0.390625 -2.734375 0.390625 0.390625 -1.171875 -1.953125 -0.390625 -0.390625 1.953125 -2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="102">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.022 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.043 180.0 185.0 190.0 195.0 200.0 205.0 209.065 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 341.247 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.307 0.276 0.234 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.218 0.242 0.265 0.288 0.312 0.335 0.354 0.367 0.453 0.568 0.716 0.89 1.08 1.276 1.475 1.675 1.877 2.08 2.287 2.496 2.71 2.929 3.154 3.386 3.626 3.877 4.138 4.414 4.706 5.02 5.361 5.74 6.173 6.649 6.7 6.674 6.569 6.396 6.173 5.913 5.627 5.326 5.019 4.711 4.407 4.112 3.827 3.556 3.298 3.054 2.825 2.611 2.411 2.225 2.051 1.891 1.742 1.604 1.477 1.359 1.251 1.151 1.059 0.974 0.896 0.824 0.757 0.696 0.64 0.589 0.541 0.497 0.457 0.42 0.386 0.355 0.326 0.3 0.276 0.254 0.233 0.214

</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="6.7" PeakHeight="341.247" Num="5" zHalfNm="315.514" Error="3.244">
-107.002 -44.211 28.099 -10.36 1.292
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="99.065" Depth="0.154"/>
<TopsideChapman PeakHeight="341.247" PeakDensity="556947.9" PeakScaleHeight="18.527" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
