<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 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="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" >
2026.03.13 (072) 17:10:00</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">
FF202607203131710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.647" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.049" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.700" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.060" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="98.234" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.243" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.125" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.242" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.291" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="344.212" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.542" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.148" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="127.330" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.266" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.434" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="160.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="133">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.1 11.15 11.2 11.25 11.3 11.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 270.000 270.000 275.000 275.000 275.000 276.250 277.500 278.750 280.000 285.000 285.000 286.875 288.750 290.625 292.500 294.375 296.250 298.125 300.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 332.500 335.000 335.000 340.000 340.000 340.000 340.000 340.000 343.333 346.667 350.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 417.500 420.000 420.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 460.000 460.000 460.000 460.000 470.000 475.000 475.000 480.000 485.000 490.000 500.000 500.000 506.876 514.785 523.982 534.807 547.734 563.443 582.940
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 45 45 48 45 0 48 0 45 48 48 0 48 0 0 0 0 0 0 54 57 57 54 0 0 0 57 60 60 54 0 60 57 57 60 60 60 0 60 60 57 0 60 60 60 57 0 63 63 57 60 63 63 60 0 0 54 60 63 0 51 60 48 51 60 63 54 57 63 66 60 63 51 57 63 60 60 63 57 63 51 57 63 63 60 63 63 63 63 60 45 51 57 60 57 60 51 57 63 57 45 51 60 51 57 48 54 45 54 57 54 54 42 51 51 54 51 51 51 48 48 48 48 42 48 45 0 0 0 0 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 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 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 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 1.953125 2.734375 -0.390625 -0.390625 0.390625 -0.390625 1.171875 -0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
98.234 98.693 99.185 99.712 100.282 100.900 101.576 102.324
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 51 54 0 57 57
</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
</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 95.243 97.407 99.572 100.0 101.736 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 344.212 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.056 3.06 2.945 2.945 2.968 3.06 3.17 3.324 3.468 3.607 3.744 3.881 4.018 4.157 4.298 4.441 4.588 4.738 4.891 5.048 5.21 5.376 5.546 5.72 5.899 6.082 6.269 6.459 6.653 6.851 7.051 7.254 7.46 7.667 7.877 8.087 8.299 8.511 8.724 8.937 9.149 9.361 9.571 9.78 9.986 10.187 10.384 10.573 10.752 10.917 11.064 11.187 11.279 11.335 11.35 11.35 11.343 11.325 11.297 11.259 11.213 11.158 11.095 11.024 10.946 10.862 10.772 10.676 10.574 10.468 10.358 10.243 10.125 10.004 9.88 9.753 9.624 9.493 9.361 9.227 9.092 8.956 8.819 8.682 8.544 8.407 8.269 8.132 7.995 7.859 7.723 7.588 7.454 7.321 7.189 7.058 6.929 6.8 6.673 6.548 6.424 6.301 6.18 6.061 5.943 5.827 5.713 5.6 5.489 5.379 5.272 5.166 5.061 4.959 4.858 4.759 4.662 4.566 4.472 4.379 4.289 4.2 4.112 4.027 3.942 3.86 3.779 3.699 3.621 3.545 3.47 3.396 3.324 3.254 3.184 3.117 3.05 2.985 2.921 2.859 2.797 2.737 2.679 2.621 2.565 2.509 2.455 2.402 2.35 2.3 2.25 2.201 2.154 2.107 2.061 2.017 1.973 1.93 1.888 1.847 1.807 1.768 1.729 1.692 1.655 1.619 1.584 1.549 1.515 1.482 1.45 1.418 1.387 1.357 1.328 1.299 1.27 1.242 1.215 1.189 1.163 1.137 1.112 1.088 1.064 1.041 1.018

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.06" PeakHeight="95.243" Num="3" Error="1.681">
-7.75 3.274 -0.767
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.06" EndFrequency="11.35" PeakHeight="344.212" Num="5" zHalfNm="248.542" Error="4.195">
-201.13 -52.881 12.035 -2.429 1.929
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.493" Depth="0.115"/>
<TopsideChapman PeakHeight="344.212" PeakDensity="1598294.0" PeakScaleHeight="70.434" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
