<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 10:50:00.000"
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="12.0">
<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: Multiple candidates for F2x cusp, F2 cusps do not match</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" >
2026.10.21 (294) 10:50:00</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">
FF202629410211050009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.257" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.804" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="335.000" 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="2.769" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="261.547" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="204.115" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.917" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="76.490" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.829" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.197" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="97.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="77">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.833 291.667 292.500 293.333 294.167 295.000 295.000 295.000 295.000 295.000 295.000 295.441 295.882 296.324 296.765 297.206 297.647 298.088 298.529 298.971 299.412 299.853 300.294 300.735 301.176 301.618 302.059 302.500 302.941 303.382 303.824 304.265 304.706 305.147 305.588 306.029 306.471 306.912 307.353 307.794 308.235 308.676 309.118 309.559 310.000 315.000 315.000 315.000 315.833 316.667 317.500 318.333 319.167 320.000 320.000 322.500 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 345.000 345.000 350.000 350.000 360.000 365.000 370.000 380.000 397.845 431.594
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 36 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 63 48 51 57 33 0 0 48 0 57 57 0 54 57 45 51 54 54 54 54 54 51 54 51 51 51 51 48 45 48 45
</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 -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="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.586 90.0 95.0 100.0 105.0 110.0 114.276 115.0 118.551 120.0 122.827 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 261.547 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.86 2.397 2.679 2.769 2.647 2.647 2.647 2.688 2.769 2.88 3.169 3.499 3.849 4.204 4.552 4.892 5.223 5.547 5.865 6.179 6.49 6.8 7.11 7.42 7.732 8.046 8.363 8.684 9.009 9.338 9.67 10.003 10.334 10.654 10.944 11.173 11.293 11.3 11.292 11.256 11.19 11.1 10.986 10.851 10.698 10.529 10.346 10.151 9.945 9.732 9.512 9.286 9.057 8.825 8.592 8.358 8.124 7.891 7.66 7.431 7.205 6.982 6.763 6.548 6.337 6.131 5.929 5.732 5.54 5.353 5.171 4.994 4.822 4.654 4.492 4.335 4.182 4.034 3.891 3.752 3.618 3.489 3.363 3.242 3.125 3.012 2.903 2.797 2.695 2.597 2.502 2.411 2.322 2.237 2.155 2.076 2.0 1.926 1.855 1.787 1.721 1.657 1.596 1.537 1.48 1.425 1.373 1.322 1.273 1.226 1.18 1.137 1.094 1.054 1.015 0.977 0.941 0.906 0.872 0.84 0.809 0.779 0.75 0.722 0.695 0.669 0.644 0.62 0.597 0.575 0.554 0.533 0.513 0.494 0.476 0.458 0.441 0.425 0.409 0.394 0.379 0.365 0.351 0.338 0.326 0.314 0.302 0.291 0.28 0.269 0.259 0.25 0.24 0.232 0.223 0.215 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.769" PeakHeight="110.0" Num="3" Error="0.0">
-29.989 12.402 -2.827
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.769" EndFrequency="11.3" PeakHeight="261.547" Num="5" zHalfNm="204.115" Error="2.535">
-120.017 -30.105 15.264 -3.644 -0.218
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.827" Depth="0.122"/>
<TopsideChapman PeakHeight="261.547" PeakDensity="1584243.1" PeakScaleHeight="41.197" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
