<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 16:40:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.08 (067) 16:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606703081640009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.595" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.674" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.410" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="95.375" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.398" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.261" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="501.175" 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="3.316" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.326" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="347.533" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="252.188" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.967" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="118.905" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.756" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.700" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="171.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.5 4.55 4.6 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 225.000 235.000 240.000 240.000 250.000 255.000 255.000 265.000 270.000 270.000 275.000 277.500 280.000 281.875 283.750 285.625 287.500 289.375 291.250 293.125 295.000 295.000 300.000 300.000 300.000 300.000 300.000 301.667 303.333 305.000 305.000 305.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 330.000 330.000 335.000 340.000 340.000 342.500 345.000 350.000 350.000 353.333 356.667 360.000 363.333 366.667 370.000 370.000 371.667 373.333 375.000 375.000 380.000 380.000 380.000 385.000 387.500 390.000 392.500 395.000 397.500 400.000 400.000 402.500 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 425.000 435.000 435.000 435.000 435.000 440.000 440.000 442.500 445.000 447.500 450.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 472.500 475.000 477.500 480.000 485.000 485.000 487.500 490.000 495.000 495.000 497.924 501.175 504.811 508.904 513.547 518.859 524.995 532.162 540.646 550.846
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 51 48 45 48 45 54 51 54 51 51 51 0 45 0 48 0 48 0 51 0 57 57 63 0 0 0 54 0 0 51 57 63 48 57 51 63 51 54 57 45 60 54 48 57 51 60 54 57 0 0 54 0 0 51 60 0 0 60 60 63 63 66 66 0 0 0 0 0 54 60 45 57 60 66 66 63 66 66 66 54 60 66 57 60 48 57 66 54 60 45 63 60 60 0 57 0 48 57 60 60 60 60 54 0 0 60 60 51 0 60 0 48 45 57 48 54 0 54 48 51 57 54 54 54 54 48 48 48 48 0
</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 -1.171875 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 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 0.390625 -0.390625 -1.171875 -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 -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 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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>
<Trace Type="standard" Layer="E" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.375 95.993 96.668 97.415 98.250 99.199 100.302 101.624 103.288 105.566
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 0 57 0 57 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.953125 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.45 3.5 3.55 3.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 100.000 100.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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" >
90.0 95.0 95.398 97.252 99.105 100.0 100.959 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.533 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.4 3.41 3.284 3.284 3.345 3.41 3.503 3.619 3.738 3.859 3.982 4.108 4.237 4.368 4.501 4.638 4.776 4.917 5.061 5.206 5.354 5.503 5.655 5.807 5.962 6.118 6.275 6.433 6.593 6.753 6.915 7.078 7.242 7.407 7.573 7.74 7.908 8.078 8.249 8.421 8.595 8.771 8.948 9.128 9.309 9.493 9.679 9.867 10.057 10.249 10.44 10.627 10.802 10.948 11.038 11.05 11.049 11.037 11.015 10.982 10.94 10.888 10.827 10.758 10.682 10.599 10.509 10.413 10.311 10.204 10.093 9.977 9.858 9.735 9.609 9.48 9.349 9.216 9.082 8.946 8.808 8.67 8.532 8.393 8.253 8.114 7.975 7.836 7.698 7.56 7.423 7.287 7.152 7.018 6.886 6.754 6.624 6.496 6.369 6.243 6.119 5.997 5.876 5.757 5.64 5.525 5.411 5.299 5.189 5.081 4.974 4.87 4.767 4.666 4.567 4.469 4.374 4.28 4.188 4.097 4.009 3.922 3.836 3.753 3.671 3.591 3.512 3.435 3.359 3.285 3.213 3.142 3.072 3.004 2.937 2.872 2.808 2.745 2.684 2.624 2.566 2.508 2.452 2.397 2.343 2.291 2.239 2.189 2.14 2.092 2.045 1.998 1.953 1.909 1.866 1.824 1.783 1.743 1.703 1.665 1.627 1.59 1.554 1.519 1.485 1.451 1.418 1.386 1.354 1.324 1.294 1.264 1.236 1.207 1.18 1.153 1.127 1.101 1.076 1.052 1.028 1.005 0.982 0.959 0.938 0.916 0.895

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.41" PeakHeight="95.398" Num="3" Error="0.686">
-8.027 3.465 -0.836
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.41" EndFrequency="11.05" PeakHeight="347.533" Num="5" zHalfNm="252.188" Error="2.905">
-186.842 -76.699 21.864 -5.899 1.002
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.561" Depth="0.126"/>
<TopsideChapman PeakHeight="347.533" PeakDensity="1514919.4" PeakScaleHeight="67.7" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
