<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 13:40:00.000"
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="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" >
2026.03.18 (077) 13:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607703181340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.542" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.135" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" 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="3.330" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.333" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="361.793" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.801" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.536" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="180.175" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.828" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="100.539" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="203.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.780" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="79">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 341.667 343.333 345.000 346.667 348.333 350.000 351.667 353.333 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 390.000 395.000 397.500 400.000 400.000 405.000 410.000 415.000 420.000 425.000 430.000 435.000 440.000 445.000 450.000 460.000 465.000 472.500 480.000 485.000 490.000 490.000 505.000 505.000 510.000 516.785 524.363 532.885 542.536 553.558 566.265 581.075 598.558 619.509 645.073 676.962 717.857
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 66 57 60 57 57 48 48 0 0 0 54 54 0 48 51 54 57 60 60 57 0 0 51 0 0 51 0 0 48 45 45 57 63 60 57 54 51 45 54 45 0 45 45 51 57 60 60 60 63 60 60 60 51 51 51 0 51 60 60 63 48 60 57 60 60 54 54 57 57 51 45 45 48 45 42
</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 2.734375 0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 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 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" >
89.492 90.0 95.0 100.0 105.0 110.0 111.795 113.59 115.0 115.385 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 361.793 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.24 2.882 3.222 3.33 3.207 3.207 3.304 3.33 3.474 3.613 3.742 3.868 3.992 4.116 4.242 4.369 4.498 4.631 4.766 4.905 5.046 5.191 5.339 5.49 5.642 5.795 5.949 6.104 6.258 6.41 6.562 6.711 6.858 7.002 7.144 7.282 7.417 7.549 7.678 7.803 7.925 8.042 8.156 8.265 8.37 8.47 8.565 8.654 8.737 8.814 8.882 8.943 8.995 9.037 9.069 9.089 9.099 9.1 9.099 9.094 9.085 9.072 9.055 9.034 9.01 8.982 8.951 8.917 8.879 8.839 8.796 8.75 8.702 8.651 8.598 8.543 8.486 8.427 8.367 8.304 8.24 8.175 8.108 8.04 7.971 7.901 7.829 7.757 7.684 7.61 7.536 7.461 7.386 7.31 7.234 7.157 7.08 7.003 6.926 6.849 6.772 6.694 6.617 6.54 6.463 6.386 6.31 6.233 6.157 6.082 6.006 5.931 5.857 5.783 5.709 5.636 5.563 5.491 5.419 5.348 5.277 5.207 5.138 5.069 5.001 4.933 4.866 4.8 4.734 4.669 4.605 4.541 4.478 4.415 4.354 4.293 4.232 4.172 4.113 4.055 3.997 3.94 3.884 3.828 3.773 3.719 3.665 3.612 3.56 3.508 3.457 3.407 3.357 3.308 3.259 3.212 3.164 3.118 3.072 3.027 2.982 2.938 2.894 2.851 2.809 2.767 2.726 2.685 2.645 2.606 2.567 2.528 2.49 2.453 2.416 2.38 2.344 2.309 2.274 2.24 2.206 2.173 2.14 2.108 2.076 2.044

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.33" PeakHeight="110.0" Num="3" Error="0.0">
-30.458 13.087 -3.137
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.33" EndFrequency="9.1" PeakHeight="361.793" Num="5" zHalfNm="225.801" Error="5.986">
-231.42 -20.257 5.953 -2.891 2.207
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.385" Depth="0.123"/>
<TopsideChapman PeakHeight="361.793" PeakDensity="1027419.4" PeakScaleHeight="100.539" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
