<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 14:20:00.000"
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="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" >
2026.03.18 (077) 14:20:00</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">
FF202607703181420009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.582" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.629" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.110" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" 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="24" Val="104.466" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="96.462" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="6.312" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" 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="3.387" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.359" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="353.056" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.580" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.857" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="175.927" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.365" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="98.358" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="204.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 326.250 327.500 328.750 330.000 335.000 337.500 340.000 340.000 340.000 340.000 341.250 342.500 343.750 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 377.500 380.000 385.000 390.000 390.000 395.000 395.000 395.000 405.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 440.000 445.000 450.000 460.000 465.000 470.000 470.000 475.000 480.000 490.000 500.000 505.000 511.896 519.701 528.606 538.862 550.801 564.875 581.713 602.216 627.730 660.345 703.506
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 45 51 0 45 0 0 51 0 0 0 51 54 54 54 57 0 57 57 60 60 60 63 51 57 60 63 66 57 57 0 57 57 54 66 66 69 66 63 57 54 51 60 63 57 66 69 66 63 60 63 63 63 60 60 60 51 54 54 57 60 57 51 51 0 51 51 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 -1.953125 0.390625 -0.390625 -0.390625 -2.734375 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -2.734375 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 -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 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
104.466 104.991 105.558 106.174
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 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 96.462 98.027 99.591 100.0 101.156 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 353.056 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.023 3.11 2.997 2.997 3.027 3.11 3.226 3.371 3.513 3.652 3.789 3.926 4.062 4.199 4.335 4.472 4.609 4.747 4.886 5.025 5.165 5.306 5.447 5.59 5.733 5.876 6.02 6.164 6.309 6.453 6.598 6.742 6.885 7.028 7.17 7.311 7.45 7.587 7.722 7.854 7.983 8.108 8.229 8.345 8.456 8.561 8.659 8.751 8.834 8.909 8.974 9.03 9.076 9.111 9.135 9.148 9.15 9.15 9.146 9.137 9.124 9.108 9.087 9.062 9.034 9.002 8.967 8.929 8.887 8.843 8.796 8.746 8.694 8.64 8.583 8.524 8.463 8.4 8.336 8.27 8.202 8.133 8.063 7.991 7.919 7.845 7.771 7.695 7.619 7.543 7.465 7.387 7.309 7.231 7.152 7.073 6.994 6.914 6.835 6.755 6.676 6.597 6.518 6.439 6.36 6.281 6.203 6.125 6.048 5.971 5.894 5.818 5.742 5.667 5.592 5.518 5.444 5.371 5.299 5.227 5.155 5.085 5.015 4.945 4.877 4.809 4.741 4.675 4.609 4.543 4.479 4.415 4.352 4.289 4.227 4.166 4.106 4.046 3.987 3.929 3.872 3.815 3.759 3.703 3.649 3.595 3.541 3.489 3.437 3.386 3.335 3.285 3.236 3.187 3.139 3.092 3.045 2.999 2.954 2.909 2.865 2.822 2.779 2.736 2.695 2.654 2.613 2.573 2.534 2.495 2.457 2.419 2.382 2.345 2.309 2.274 2.239 2.204 2.17 2.137 2.104 2.071 2.039 2.008 1.977 1.946 1.916

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.11" PeakHeight="96.462" Num="3" Error="2.818">
-9.559 4.051 -0.954
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.11" EndFrequency="9.15" PeakHeight="353.056" Num="5" zHalfNm="220.58" Error="3.786">
-236.703 -22.213 6.793 0.033 0.19
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.694" Depth="0.113"/>
<TopsideChapman PeakHeight="353.056" PeakDensity="1038740.7" PeakScaleHeight="98.358" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
