<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 17:30:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2o cusp</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" >
2026.03.20 (079) 17:30:00</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">
FF202607903201730009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.665" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.915" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.200" 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="3.173" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.258" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="346.824" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.538" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.256" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.625" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.663" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.332" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="151.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="133">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.25 4.3 4.35 4.4 4.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 232.500 235.000 240.000 245.000 250.000 255.000 259.286 263.571 267.857 272.143 276.429 280.714 285.000 290.000 295.000 297.000 299.000 301.000 303.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 331.000 332.000 333.000 334.000 335.000 335.000 335.000 336.250 337.500 338.750 340.000 343.333 346.667 350.000 350.000 350.000 350.000 350.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 372.500 375.000 375.000 380.000 381.250 382.500 383.750 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 396.667 398.333 400.000 400.000 405.000 405.000 405.000 407.500 410.000 410.000 415.000 412.500 410.000 415.000 417.500 420.000 420.000 425.000 426.250 427.500 428.750 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 473.810 478.038 482.759 488.064 494.068 500.919 508.810 517.996 528.827 541.787 557.571
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 0 54 51 0 45 45 45 0 0 0 51 0 48 45 48 0 0 0 0 54 45 0 57 45 0 60 0 60 57 60 0 60 60 63 63 0 57 60 0 60 0 0 57 54 48 0 57 0 60 0 0 63 63 60 0 48 63 63 66 66 60 66 66 60 63 0 57 63 51 0 0 0 54 60 60 60 66 63 63 66 66 0 42 63 63 63 66 66 0 66 69 57 0 66 66 0 63 66 48 0 0 45 51 60 63 54 60 63 57 60 54 57 57 57 51 54 51 54 54 51 51 48 48 0 45 42 45 0 0 42 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 -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 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 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 -2.734375 -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 1.953125 -0.390625 -0.390625 -0.390625 -1.953125 2.734375 -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" >
89.517 90.0 95.0 100.0 105.0 110.0 112.457 114.915 115.0 117.372 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.824 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.134 2.746 3.07 3.173 3.051 3.051 3.055 3.173 3.243 3.373 3.502 3.63 3.759 3.888 4.019 4.152 4.287 4.425 4.566 4.709 4.856 5.006 5.16 5.317 5.478 5.643 5.811 5.984 6.159 6.339 6.522 6.709 6.899 7.092 7.289 7.488 7.691 7.896 8.104 8.314 8.526 8.74 8.955 9.17 9.386 9.6 9.812 10.018 10.216 10.401 10.566 10.702 10.799 10.846 10.85 10.847 10.833 10.807 10.77 10.723 10.666 10.599 10.524 10.441 10.35 10.253 10.15 10.041 9.926 9.807 9.684 9.557 9.427 9.294 9.158 9.02 8.881 8.74 8.598 8.455 8.311 8.167 8.023 7.879 7.736 7.593 7.45 7.309 7.168 7.029 6.89 6.753 6.618 6.483 6.351 6.22 6.091 5.963 5.838 5.714 5.592 5.472 5.354 5.237 5.123 5.011 4.901 4.792 4.686 4.581 4.479 4.378 4.28 4.183 4.088 3.995 3.904 3.815 3.728 3.642 3.559 3.477 3.396 3.318 3.241 3.166 3.092 3.02 2.95 2.881 2.814 2.748 2.683 2.62 2.559 2.499 2.44 2.382 2.326 2.271 2.218 2.165 2.114 2.064 2.015 1.967 1.921 1.875 1.831 1.787 1.745 1.703 1.663 1.623 1.584 1.547 1.51 1.474 1.439 1.404 1.371 1.338 1.306 1.275 1.245 1.215 1.186 1.158 1.13 1.103 1.077 1.051 1.026 1.001 0.977 0.954 0.931 0.909 0.887 0.866 0.845 0.825 0.805 0.786 0.767 0.749

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.173" PeakHeight="110.0" Num="3" Error="0.0">
-30.336 12.909 -3.056
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.173" EndFrequency="10.85" PeakHeight="346.824" Num="5" zHalfNm="259.538" Error="3.498">
-181.12 -58.51 11.019 -1.8 0.959
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.372" Depth="0.122"/>
<TopsideChapman PeakHeight="346.824" PeakDensity="1460576.9" PeakScaleHeight="64.332" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
