<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-13 -286 04:00:00.000"
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="18.0">
<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 44 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Severe F-spread, F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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) 04:00:00</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">
FF202628610130400009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.914" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.376" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="5.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="367.143" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="360.106" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="312.057" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.190" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="69.604" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.414" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.326" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="68.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="20">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 345.000 350.000 355.714 361.429 367.143 372.857 378.571 384.286 390.000 410.000 470.000 415.000 428.000 441.000 454.000 467.000 480.000 535.000 500.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 72 72 69 0 0 69 0 69 0 63 57 66 0 66 0 63 57 60 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 1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="152">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.309 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.619 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.928 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 360.106 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0
</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 0.318 0.295 0.265 0.224 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.222 0.243 0.263 0.284 0.305 0.325 0.346 0.354 0.41 0.509 0.62 0.745 0.884 1.04 1.215 1.41 1.628 1.87 2.138 2.431 2.749 3.088 3.445 3.813 4.185 4.554 4.91 5.247 5.557 5.836 6.078 6.28 6.44 6.556 6.626 6.65 6.65 6.639 6.605 6.55 6.478 6.39 6.287 6.173 6.048 5.915 5.775 5.629 5.479 5.326 5.171 5.015 4.859 4.703 4.549 4.395 4.244 4.096 3.95 3.807 3.668 3.532 3.4 3.271 3.146 3.025 2.907 2.794 2.684 2.577 2.475 2.376 2.281 2.189 2.1 2.015 1.933 1.854 1.778 1.705 1.635 1.568 1.503 1.441 1.381 1.324 1.269 1.216 1.165 1.117 1.07 1.026 0.983 0.942 0.902 0.865 0.828 0.794 0.761 0.729 0.698 0.669 0.641 0.614 0.588 0.563 0.54 0.517 0.495 0.475 0.455 0.436 0.417 0.4 0.383 0.367 0.351 0.337 0.322 0.309 0.296 0.283 0.271 0.26 0.249 0.239 0.229 0.219 0.21 0.201

</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="6.65" PeakHeight="360.106" Num="5" zHalfNm="312.057" Error="4.202">
-139.282 1.696 -2.094 1.763 -0.261
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.928" Depth="0.154"/>
<TopsideChapman PeakHeight="360.106" PeakDensity="548666.25" PeakScaleHeight="36.326" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
