<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-31 -090 20:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.03.31 (090) 20:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202609003312050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.679" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.809" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="492.452" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.378" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="363.753" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="294.571" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.526" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="99.243" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.218" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.156" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="112.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="165">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 276.667 278.333 280.000 280.000 281.429 282.857 284.286 285.714 287.143 288.571 290.000 292.500 295.000 290.000 291.250 292.500 293.750 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 302.500 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 310.000 313.333 316.667 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 326.667 328.333 330.000 331.000 332.000 333.000 334.000 335.000 335.000 335.000 335.000 337.500 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 357.500 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 416.667 418.333 420.000 425.000 425.000 427.500 430.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 460.000 460.000 460.000 460.000 460.000 467.500 475.000 475.000 480.000 480.000 480.000 481.560 483.441 485.754 488.668 492.452 497.564 504.850 516.074 535.610
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 54 63 63 63 60 54 0 0 57 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 63 0 0 51 0 0 0 63 63 63 57 0 0 0 69 0 66 69 0 0 60 0 54 72 66 0 72 48 0 0 69 0 48 0 0 60 66 69 72 0 72 48 60 63 63 54 0 69 69 66 63 0 54 63 66 60 57 0 69 69 54 66 72 72 57 69 0 72 66 63 51 60 66 69 72 69 69 57 63 72 75 66 69 51 63 69 69 69 69 72 0 66 66 0 0 63 57 60 0 60 60 63 57 57 54 57 51 57 48 57 57 51 45 54 57 51 54 0 51 54 54 51 51 45 0 48 0 48 48 0 0 42
</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" >
89.995 90.0 95.0 100.0 105.0 110.0 115.0 120.0 122.2 125.0 130.0 134.4 135.0 140.0 145.0 146.6 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.753 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.2 0.92 1.194 1.334 1.378 1.353 1.277 1.225 1.225 1.225 1.225 1.233 1.295 1.358 1.378 1.489 1.635 1.774 1.913 2.056 2.206 2.363 2.529 2.706 2.894 3.094 3.306 3.53 3.764 4.009 4.262 4.522 4.789 5.06 5.334 5.611 5.89 6.171 6.452 6.734 7.017 7.301 7.585 7.87 8.156 8.443 8.73 9.018 9.307 9.595 9.882 10.167 10.446 10.715 10.966 11.189 11.365 11.474 11.5 11.499 11.483 11.446 11.39 11.317 11.227 11.122 11.004 10.873 10.732 10.581 10.421 10.254 10.08 9.901 9.718 9.53 9.34 9.147 8.953 8.758 8.562 8.366 8.171 7.977 7.784 7.593 7.403 7.216 7.031 6.849 6.669 6.493 6.319 6.148 5.981 5.817 5.657 5.499 5.346 5.195 5.048 4.905 4.765 4.628 4.495 4.365 4.238 4.114 3.994 3.877 3.763 3.652 3.544 3.439 3.337 3.238 3.142 3.048 2.957 2.868 2.782 2.699 2.618 2.539 2.462 2.388 2.316 2.246 2.178 2.112 2.048 1.986 1.926 1.867 1.81 1.755 1.702 1.65 1.6 1.551 1.504 1.458 1.414 1.37 1.329 1.288 1.249 1.211 1.174 1.138 1.103 1.069 1.037 1.005 0.974 0.944 0.915 0.887 0.86 0.834 0.808 0.784 0.76 0.736 0.714 0.692 0.671 0.65 0.63 0.611 0.592 0.574 0.556 0.539 0.523 0.507 0.491 0.476 0.462 0.448 0.434 0.42 0.408 0.395 0.383 0.371 0.36

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.378" PeakHeight="110.0" Num="3" Error="0.0">
-27.816 9.506 -1.695
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.378" EndFrequency="11.5" PeakHeight="363.753" Num="5" zHalfNm="294.571" Error="3.461">
-188.422 -42.98 19.069 -8.222 3.402
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="36.6" Depth="0.153"/>
<TopsideChapman PeakHeight="363.753" PeakDensity="1640818.9" PeakScaleHeight="50.156" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
