<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 20:20:00.000"
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="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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.10.28 (301) 20:20:00</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">
FF202630110282020009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.530" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.687" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="435.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="435.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="497.143" 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="1.632" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="384.890" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="282.927" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.418" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="144.010" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.503" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.451" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="40">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 475.000 480.000 480.000 482.857 485.714 488.571 491.429 494.286 497.143 500.000 504.585 509.672 515.349 521.724 528.936 537.161 546.626 557.638 570.608 586.109 604.962 628.386 658.275
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 60 0 60 66 57 66 57 66 69 66 0 66 0 63 0 63 60 0 0 63 0 0 0 0 60 60 57 57 60 57 54 51 54 51 51 0 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 -1.171875 2.734375 -0.390625 -2.734375 -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 -1.171875 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.881 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.384 125.0 130.0 130.768 135.0 140.0 141.152 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.89 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21 1.092 1.414 1.58 1.632 1.6 1.501 1.49 1.49 1.49 1.49 1.548 1.616 1.632 1.737 1.873 2.011 2.155 2.305 2.462 2.627 2.8 2.983 3.175 3.375 3.583 3.799 4.022 4.249 4.481 4.717 4.955 5.194 5.434 5.675 5.915 6.154 6.392 6.629 6.863 7.096 7.326 7.554 7.779 8.0 8.218 8.431 8.64 8.844 9.042 9.233 9.416 9.591 9.756 9.909 10.05 10.176 10.286 10.379 10.453 10.507 10.539 10.55 10.55 10.545 10.532 10.51 10.481 10.444 10.4 10.349 10.292 10.229 10.16 10.086 10.007 9.923 9.836 9.744 9.649 9.55 9.449 9.345 9.238 9.129 9.018 8.906 8.791 8.676 8.56 8.442 8.324 8.206 8.087 7.967 7.848 7.729 7.609 7.491 7.372 7.254 7.136 7.02 6.903 6.788 6.674 6.56 6.448 6.336 6.226 6.117 6.009 5.902 5.796 5.692 5.589 5.488 5.387 5.288 5.191 5.094 5.0 4.906 4.814 4.723 4.634 4.546 4.46 4.374 4.291 4.208 4.127 4.047 3.969 3.892 3.816 3.742 3.669 3.597 3.527 3.457 3.389 3.323 3.257 3.193 3.129 3.067 3.006 2.947 2.888 2.83 2.774 2.718 2.664 2.611 2.558 2.507 2.457 2.407 2.359 2.312 2.265 2.219 2.175 2.131 2.088 2.046 2.004 1.964 1.924 1.885 1.847 1.809 1.773 1.737 1.701 1.667 1.633 1.6 1.567 1.535 1.504 1.474 1.444 1.414 1.385 1.357

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.632" PeakHeight="110.0" Num="3" Error="0.0">
-28.416 10.257 -1.96
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.632" EndFrequency="10.55" PeakHeight="384.89" Num="5" zHalfNm="282.927" Error="2.36">
-236.923 -11.942 8.038 -4.526 1.615
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="31.152" Depth="0.142"/>
<TopsideChapman PeakHeight="384.89" PeakDensity="1380924.4" PeakScaleHeight="75.451" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
