<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 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" >
2026.10.29 (302) 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">
FF202630210292020009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.478" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.668" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="480.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="480.000" 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="8.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" 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="1.631" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="391.977" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="283.336" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.418" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="152.782" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.903" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.620" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.890" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
480.000 485.000 490.000 495.000 500.000 505.000 510.000 510.000 515.000 520.895 527.407 534.639 542.716 551.797 562.081 573.824 587.359 603.132 621.746 644.047 671.250
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 60 60 0 57 0 63 60 63 63 60 63 60 60 60 57 57 0 0 51
</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
</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" >
89.882 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.388 125.0 130.0 130.775 135.0 140.0 141.163 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 391.977 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21 1.091 1.413 1.579 1.631 1.599 1.5 1.489 1.489 1.489 1.489 1.547 1.615 1.631 1.726 1.85 1.977 2.107 2.242 2.383 2.53 2.684 2.844 3.012 3.186 3.367 3.554 3.746 3.943 4.143 4.347 4.553 4.761 4.97 5.179 5.388 5.597 5.804 6.011 6.216 6.419 6.62 6.819 7.015 7.207 7.397 7.583 7.764 7.942 8.114 8.28 8.44 8.593 8.738 8.874 9.001 9.117 9.221 9.313 9.391 9.454 9.502 9.534 9.549 9.55 9.549 9.541 9.526 9.506 9.479 9.446 9.407 9.363 9.315 9.261 9.203 9.141 9.075 9.005 8.932 8.855 8.776 8.694 8.61 8.523 8.434 8.343 8.25 8.156 8.061 7.964 7.867 7.768 7.669 7.569 7.469 7.368 7.267 7.166 7.065 6.964 6.863 6.762 6.662 6.562 6.462 6.363 6.265 6.167 6.07 5.973 5.878 5.783 5.689 5.596 5.504 5.413 5.322 5.233 5.145 5.058 4.972 4.887 4.803 4.72 4.638 4.557 4.477 4.399 4.321 4.245 4.17 4.096 4.023 3.951 3.88 3.81 3.741 3.674 3.607 3.542 3.477 3.414 3.351 3.29 3.23 3.17 3.112 3.055 2.998 2.943 2.888 2.835 2.782 2.73 2.679 2.63 2.58 2.532 2.485 2.438 2.393 2.348 2.304 2.26 2.218 2.176 2.135 2.095 2.056 2.017 1.979 1.941 1.905 1.869 1.833 1.798 1.764 1.731 1.698 1.666 1.634 1.603 1.573 1.543 1.514 1.485

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.631" PeakHeight="110.0" Num="3" Error="0.0">
-28.413 10.254 -1.959
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.631" EndFrequency="9.55" PeakHeight="391.977" Num="5" zHalfNm="283.336" Error="2.506">
-245.087 -9.871 6.424 -3.655 1.375
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="31.163" Depth="0.142"/>
<TopsideChapman PeakHeight="391.977" PeakDensity="1131544.6" PeakScaleHeight="80.62" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
