<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 21:30:00.000"
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 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" >
2026.03.30 (089) 21:30:00</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">
FF202608903302130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.745" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.248" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.588" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="368.825" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="313.236" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.173" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="82.098" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.098" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.700" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.530" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.770" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="189">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 2.5 2.55 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 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 280.000 281.667 283.333 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 285.000 286.250 287.500 288.750 290.000 291.250 292.500 293.750 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 300.000 302.000 304.000 306.000 308.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 311.667 313.333 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 321.429 322.857 324.286 325.714 327.143 328.571 330.000 330.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 335.000 337.500 340.000 342.500 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 357.500 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 397.500 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 412.500 415.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 446.250 447.500 448.750 450.000 455.000 455.000 460.000 465.000 470.000 470.000 474.694 480.085 486.338 493.680 502.422
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 66 0 72 66 69 0 0 66 0 54 69 54 0 0 69 69 0 0 0 0 60 72 48 0 0 0 0 0 0 0 0 0 0 0 60 0 66 72 54 0 0 66 63 60 63 54 0 0 0 0 63 63 63 60 57 54 63 60 0 0 66 69 69 69 69 0 0 0 0 72 0 60 0 60 0 0 57 0 63 0 0 69 60 66 0 69 57 69 0 66 0 57 63 66 66 72 75 75 75 69 72 54 75 0 72 0 72 0 66 0 72 54 78 66 69 72 0 60 63 63 69 72 63 66 66 69 63 66 72 75 66 69 72 75 75 69 72 72 72 66 69 0 66 69 66 60 63 54 60 63 51 57 63 63 60 0 0 45 57 60 63 60 63 63 60 63 60 60 60 54 57 54 0 0 0 45 48 48 42 51 48 54 42 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="179">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.154 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.712 140.0 145.0 150.0 155.0 160.0 163.423 165.0 170.0 175.0 180.0 185.0 190.0 190.135 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.825 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.39 0.509 0.569 0.588 0.58 0.555 0.51 0.44 0.327 0.269 0.269 0.269 0.269 0.269 0.269 0.269 0.288 0.348 0.407 0.467 0.527 0.586 0.588 0.73 0.851 0.974 1.108 1.259 1.431 1.632 1.867 2.141 2.455 2.805 3.183 3.579 3.985 4.394 4.805 5.214 5.623 6.029 6.434 6.839 7.242 7.646 8.048 8.45 8.851 9.25 9.644 10.031 10.407 10.763 11.089 11.371 11.588 11.719 11.75 11.749 11.724 11.669 11.584 11.474 11.34 11.186 11.014 10.827 10.626 10.413 10.191 9.961 9.726 9.485 9.242 8.996 8.75 8.504 8.258 8.015 7.773 7.535 7.3 7.069 6.842 6.619 6.401 6.188 5.981 5.778 5.581 5.388 5.202 5.02 4.844 4.673 4.507 4.347 4.191 4.041 3.895 3.754 3.618 3.486 3.359 3.237 3.118 3.003 2.893 2.786 2.684 2.584 2.489 2.396 2.307 2.222 2.139 2.059 1.983 1.909 1.838 1.769 1.703 1.639 1.578 1.519 1.462 1.407 1.354 1.304 1.255 1.208 1.162 1.119 1.077 1.036 0.997 0.96 0.924 0.889 0.856 0.824 0.793 0.763 0.734 0.707 0.68 0.654 0.63 0.606 0.583 0.561 0.54 0.52 0.5 0.481 0.463 0.446 0.429 0.413 0.397 0.382 0.368 0.354 0.341 0.328 0.316 0.304 0.292 0.281 0.271 0.261 0.251 0.241 0.232 0.223 0.215 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.588" PeakHeight="110.0" Num="3" Error="0.0">
-23.531 5.245 -0.56
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.588" EndFrequency="11.75" PeakHeight="368.825" Num="5" zHalfNm="313.236" Error="3.922">
-170.172 -16.715 12.759 -8.891 4.329
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="80.135" Depth="0.319"/>
<TopsideChapman PeakHeight="368.825" PeakDensity="1712934.2" PeakScaleHeight="40.7" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
