<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 20:20:00.000"
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="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 F2x 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" >
2026.03.17 (076) 20:20:00</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">
FF202607603172020009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.662" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.146" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.004" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="358.891" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="278.812" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.662" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="110.948" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.743" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.919" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="123.800" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.540" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="168">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 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 10.9 10.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.833 246.667 247.500 248.333 249.167 250.000 250.000 255.000 260.000 262.500 265.000 260.000 260.000 260.000 260.000 260.000 261.429 262.857 264.286 265.714 267.143 268.571 270.000 270.000 275.000 275.000 275.000 275.000 275.000 280.000 281.333 282.667 284.000 285.333 286.667 288.000 289.333 290.667 292.000 293.333 294.667 296.000 297.333 298.667 300.000 300.000 300.000 300.000 300.000 300.000 303.333 306.667 310.000 310.000 310.000 312.500 315.000 315.000 315.000 316.250 317.500 318.750 320.000 320.000 320.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 337.500 340.000 342.500 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 377.500 380.000 380.000 382.500 385.000 385.000 385.000 385.000 387.500 390.000 390.000 390.000 392.500 395.000 397.500 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 425.000 426.667 428.333 430.000 431.667 433.333 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 480.000 485.000 485.000 490.000 496.466 504.194 513.594 525.274 540.176 559.850
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 54 0 57 0 57 60 0 63 0 0 0 63 57 0 60 0 0 72 0 69 69 57 0 0 0 0 0 0 63 66 69 0 69 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66 69 69 69 66 63 57 0 66 69 69 0 66 69 69 0 0 0 69 69 0 0 57 63 69 0 72 66 0 72 75 0 72 0 66 0 72 60 66 69 72 72 69 69 69 66 69 60 66 72 60 66 69 75 66 69 69 63 69 72 60 66 48 69 72 63 69 0 69 48 69 60 69 51 0 66 69 57 63 69 57 63 66 57 63 0 66 63 0 0 66 0 0 63 60 54 60 54 60 57 51 57 54 54 54 54 54 51 48 48 48 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.759 90.0 95.0 100.0 105.0 110.0 115.0 118.188 120.0 125.0 126.375 130.0 134.563 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.891 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.221 1.343 1.736 1.939 2.004 1.955 1.872 1.872 1.872 1.872 1.93 2.004 2.013 2.116 2.22 2.327 2.439 2.555 2.678 2.808 2.946 3.093 3.251 3.42 3.601 3.794 4.001 4.22 4.451 4.692 4.942 5.198 5.459 5.722 5.987 6.251 6.515 6.776 7.036 7.294 7.55 7.803 8.054 8.303 8.549 8.794 9.036 9.275 9.511 9.742 9.968 10.184 10.388 10.574 10.734 10.857 10.932 10.95 10.95 10.938 10.912 10.872 10.819 10.754 10.677 10.59 10.493 10.387 10.273 10.152 10.025 9.891 9.753 9.61 9.463 9.312 9.159 9.003 8.845 8.686 8.526 8.365 8.204 8.042 7.881 7.72 7.56 7.401 7.244 7.087 6.932 6.779 6.627 6.478 6.33 6.185 6.041 5.9 5.761 5.625 5.491 5.359 5.23 5.103 4.978 4.856 4.737 4.62 4.505 4.393 4.283 4.176 4.07 3.968 3.867 3.769 3.673 3.579 3.488 3.399 3.311 3.226 3.143 3.062 2.983 2.905 2.83 2.757 2.685 2.615 2.547 2.48 2.416 2.352 2.291 2.231 2.172 2.115 2.06 2.006 1.953 1.901 1.851 1.803 1.755 1.709 1.664 1.62 1.577 1.535 1.495 1.455 1.417 1.379 1.343 1.307 1.273 1.239 1.206 1.174 1.143 1.113 1.083 1.054 1.026 0.999 0.973 0.947 0.922 0.897 0.873 0.85 0.828 0.806 0.784 0.763 0.743 0.723 0.704 0.685 0.667 0.65 0.632 0.615 0.599 0.583 0.568

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.004" PeakHeight="110.0" Num="3" Error="0.0">
-29.076 11.126 -2.291
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.004" EndFrequency="10.95" PeakHeight="358.891" Num="5" zHalfNm="278.812" Error="3.127">
-188.178 -41.853 11.357 -8.541 2.887
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="24.563" Depth="0.132"/>
<TopsideChapman PeakHeight="358.891" PeakDensity="1487624.1" PeakScaleHeight="57.919" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
