<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 19:30:00.000"
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 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" >
2026.03.12 (071) 19:30:00</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">
FF202607103121930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.511" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.125" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.546" 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="384.171" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.907" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.681" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="152.441" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.647" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.487" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="169.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="160">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 235.000 235.000 240.000 240.000 240.000 240.000 237.500 235.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 247.500 250.000 252.500 255.000 255.000 260.000 260.000 265.000 265.000 267.500 270.000 270.000 270.000 270.000 270.000 272.500 275.000 277.500 280.000 280.000 282.500 285.000 287.500 290.000 290.000 292.500 295.000 295.000 297.500 300.000 300.000 300.000 300.000 305.000 305.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 327.500 330.000 332.500 335.000 335.000 335.000 340.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 355.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 435.000 436.250 437.500 438.750 440.000 440.000 445.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 500.000 505.000 505.000 515.000 520.000 525.000 530.000 535.000 542.958 551.987 562.317 574.252 588.197 604.706 624.560 648.888 679.395
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 60 54 0 51 54 48 48 60 51 57 60 60 54 45 48 0 0 63 57 63 63 0 0 0 0 60 60 57 51 0 57 0 57 54 0 57 0 54 57 0 51 57 0 54 57 57 60 57 60 54 57 60 0 57 0 60 57 45 60 0 63 0 60 0 63 0 63 0 63 0 60 63 54 60 66 54 0 66 57 0 51 60 66 57 63 69 63 66 60 66 57 66 57 66 66 63 69 60 66 60 66 69 63 66 60 66 66 63 69 60 63 69 69 69 69 60 0 0 0 63 66 63 66 54 63 63 60 63 54 60 60 60 60 60 57 48 57 54 57 57 54 54 51 51 51 51 54 51 51 51 51 48 0 0 0 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" >
89.63 90.0 95.0 100.0 105.0 110.0 115.0 115.352 120.0 120.704 125.0 126.056 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.171 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.71 2.204 2.464 2.546 2.438 2.422 2.422 2.422 2.522 2.546 2.638 2.757 2.881 3.011 3.146 3.287 3.435 3.589 3.751 3.92 4.096 4.278 4.467 4.662 4.861 5.065 5.272 5.481 5.693 5.905 6.119 6.332 6.545 6.757 6.968 7.179 7.388 7.595 7.801 8.005 8.207 8.407 8.606 8.802 8.995 9.186 9.374 9.559 9.739 9.915 10.086 10.251 10.409 10.557 10.696 10.822 10.933 11.028 11.105 11.159 11.192 11.2 11.2 11.194 11.181 11.16 11.132 11.097 11.056 11.008 10.955 10.895 10.831 10.761 10.687 10.609 10.526 10.44 10.35 10.256 10.16 10.061 9.959 9.855 9.749 9.641 9.532 9.421 9.308 9.194 9.08 8.965 8.849 8.732 8.615 8.498 8.381 8.263 8.146 8.029 7.912 7.796 7.68 7.564 7.45 7.335 7.222 7.109 6.998 6.887 6.777 6.668 6.56 6.453 6.347 6.243 6.139 6.037 5.935 5.835 5.737 5.639 5.543 5.448 5.354 5.261 5.17 5.08 4.991 4.904 4.817 4.732 4.649 4.566 4.485 4.405 4.326 4.249 4.172 4.097 4.023 3.951 3.879 3.809 3.74 3.672 3.605 3.539 3.474 3.41 3.348 3.286 3.226 3.167 3.108 3.051 2.995 2.939 2.885 2.831 2.779 2.727 2.677 2.627 2.578 2.53 2.483 2.436 2.391 2.346 2.302 2.259 2.217 2.176 2.135 2.095 2.056 2.017 1.979 1.942 1.905 1.87 1.834 1.8 1.766 1.733

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.546" PeakHeight="110.0" Num="3" Error="0.0">
-29.764 12.081 -2.687
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.546" EndFrequency="11.2" PeakHeight="384.171" Num="5" zHalfNm="272.907" Error="3.605">
-234.18 -30.477 11.316 -6.269 1.495
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.056" Depth="0.124"/>
<TopsideChapman PeakHeight="384.171" PeakDensity="1556327.5" PeakScaleHeight="81.487" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
