<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 17:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.03.29 (088) 17:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608803291710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="14.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.822" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="41.197" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="15.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="13.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" 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="3.222" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.282" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="321.411" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.522" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.151" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.650" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="109.802" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="68.794" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.581" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7 13.75 13.8 13.85 13.9 13.95 14.0 14.05 14.1 14.15 14.2 14.25 14.3 14.35 14.4 14.45 14.5 14.55 14.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 335.000 335.000 336.667 338.333 340.000 340.000 345.000 345.000 342.500 340.000 345.000 342.500 340.000 340.000 342.500 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 346.667 348.333 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 375.000 377.500 380.000 382.500 385.000 380.000 380.000 380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 445.000 445.000 450.000 455.000 460.000 466.072 473.199 481.684 491.953 504.636 520.699 541.700
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 66 66 66 66 66 66 66 69 69 69 66 66 66 63 63 60 60 60 57 54 57 60 60 60 60 57 48 0 0 57 60 54 51 0 57 57 0 54 57 0 57 0 60 0 60 0 0 57 0 0 57 0 0 0 0 57 60 60 60 60 60 63 60 0 0 0 60 63 0 63 63 0 63 0 63 0 60 0 60 60 0 57 60 0 0 0 42 57 57 57 0 0 0 54 57 51 54 42 51 0 48 54 57 54 57 54 57 51 57 54 54 57 54 54 48 57 57 57 57 54 57 54 54 51 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 120.000 117.500 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 116.000 117.000 118.000 119.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 118.750 117.500 116.250 115.000 110.000 110.455 110.909 111.364 111.818 112.273 112.727 113.182 113.636 114.091 114.545 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 48 51 54 63 60 0 57 0 60 57 0 0 0 0 60 63 0 0 0 0 0 0 66 66 66 63 63 63 0 0 0 0 0 0 0 0 0 72 72 72 69 66 66 66 69 69 72 72 72 60 60 0 57 0 66 48 0 0 0 0 0 0 0 0 0 0 72 72 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.509 90.0 95.0 100.0 105.0 110.0 112.251 114.503 115.0 116.754 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 321.411 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.167 2.789 3.117 3.222 3.1 3.1 3.127 3.222 3.375 3.641 3.933 4.237 4.54 4.839 5.131 5.416 5.696 5.972 6.244 6.515 6.785 7.055 7.326 7.599 7.874 8.152 8.434 8.719 9.01 9.306 9.607 9.914 10.227 10.546 10.872 11.203 11.538 11.877 12.218 12.558 12.892 13.217 13.525 13.81 14.063 14.275 14.44 14.549 14.597 14.6 14.595 14.571 14.529 14.47 14.395 14.305 14.201 14.084 13.956 13.816 13.667 13.508 13.342 13.168 12.988 12.802 12.611 12.416 12.217 12.015 11.811 11.605 11.397 11.189 10.98 10.771 10.562 10.353 10.146 9.939 9.734 9.531 9.329 9.129 8.932 8.737 8.544 8.354 8.166 7.982 7.8 7.621 7.445 7.272 7.102 6.935 6.772 6.611 6.453 6.299 6.147 5.999 5.853 5.711 5.572 5.435 5.302 5.171 5.044 4.919 4.797 4.678 4.561 4.448 4.336 4.228 4.122 4.018 3.917 3.818 3.722 3.628 3.536 3.446 3.359 3.274 3.19 3.109 3.03 2.953 2.878 2.804 2.733 2.663 2.595 2.528 2.463 2.4 2.339 2.279 2.22 2.163 2.108 2.054 2.001 1.949 1.899 1.85 1.803 1.756 1.711 1.667 1.624 1.582 1.542 1.502 1.463 1.425 1.389 1.353 1.318 1.284 1.251 1.218 1.187 1.156 1.126 1.097 1.069 1.041 1.014 0.988 0.963 0.938 0.914 0.89 0.867 0.845 0.823 0.801 0.781 0.761 0.741 0.722 0.703 0.685

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.222" PeakHeight="110.0" Num="3" Error="0.0">
-30.375 12.966 -3.082
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.222" EndFrequency="14.6" PeakHeight="321.411" Num="5" zHalfNm="241.522" Error="3.779">
-181.611 -36.218 14.724 0.166 -1.718
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.754" Depth="0.122"/>
<TopsideChapman PeakHeight="321.411" PeakDensity="2644665.0" PeakScaleHeight="59.581" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
