<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 17:40:00.000"
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" >
2026.02.19 (050) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202605002191740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.585" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.408" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="475.000" 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="3.153" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.249" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="373.254" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="278.661" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.368" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="128.914" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.849" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.190" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 245.000 250.000 253.333 256.667 260.000 260.000 265.000 270.000 275.000 280.000 285.000 285.000 290.000 295.000 295.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 320.000 330.000 330.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 347.500 350.000 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 382.500 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 430.000 430.000 435.000 436.250 437.500 438.750 440.000 440.000 442.500 445.000 450.000 451.667 453.333 455.000 460.000 460.000 465.000 468.333 471.667 475.000 475.000 480.000 485.000 487.500 490.000 495.000 500.000 505.545 511.751 518.744 526.683 535.773 546.286 558.584 573.162 590.721 612.279 639.377
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 54 51 0 0 57 54 57 0 66 66 63 63 63 60 0 48 0 45 54 54 57 51 48 0 51 54 57 60 60 51 54 51 0 0 54 51 57 57 54 51 57 57 57 60 63 60 60 0 54 57 0 63 60 57 51 0 60 60 60 60 0 63 66 66 63 66 66 63 63 0 63 63 66 66 0 63 66 57 0 63 66 57 0 63 66 63 63 66 66 66 63 66 63 0 66 60 57 66 0 63 60 60 0 63 0 63 57 54 60 60 60 57 57 60 45 0 54 0 57 51 0 0 0 54 54 0 54 48 0 0 48 45 51 48 0 0 45 51 48 48 0 48 51 51 0 0 51 51 0 51 0 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" >
89.521 90.0 95.0 100.0 105.0 110.0 112.544 115.0 115.088 117.632 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.254 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.12 2.729 3.05 3.153 3.031 3.031 3.031 3.153 3.217 3.35 3.481 3.61 3.739 3.869 3.999 4.13 4.264 4.399 4.537 4.677 4.82 4.966 5.116 5.27 5.427 5.589 5.755 5.926 6.102 6.283 6.47 6.662 6.86 7.064 7.274 7.489 7.712 7.94 8.174 8.413 8.657 8.906 9.158 9.413 9.669 9.925 10.178 10.427 10.669 10.902 11.122 11.329 11.517 11.685 11.831 11.951 12.044 12.109 12.144 12.15 12.149 12.14 12.12 12.089 12.049 12.0 11.942 11.876 11.802 11.721 11.633 11.539 11.44 11.334 11.224 11.11 10.991 10.869 10.743 10.614 10.482 10.348 10.212 10.074 9.935 9.794 9.652 9.51 9.367 9.223 9.08 8.936 8.792 8.649 8.507 8.364 8.223 8.082 7.942 7.804 7.666 7.53 7.395 7.261 7.129 6.998 6.868 6.74 6.614 6.489 6.366 6.245 6.125 6.007 5.891 5.776 5.664 5.553 5.443 5.336 5.23 5.126 5.024 4.923 4.824 4.727 4.632 4.538 4.446 4.356 4.267 4.18 4.094 4.01 3.928 3.847 3.768 3.69 3.614 3.539 3.465 3.393 3.323 3.254 3.186 3.119 3.054 2.99 2.928 2.866 2.806 2.747 2.689 2.633 2.577 2.523 2.47 2.418 2.367 2.317 2.268 2.22 2.173 2.127 2.082 2.038 1.995 1.952 1.911 1.87 1.831 1.792 1.754 1.716 1.68 1.644 1.609 1.575 1.542 1.509 1.477 1.445 1.414 1.384 1.355 1.326

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.153" PeakHeight="110.0" Num="3" Error="0.0">
-30.32 12.886 -3.045
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.153" EndFrequency="12.15" PeakHeight="373.254" Num="5" zHalfNm="278.661" Error="3.249">
-211.815 -48.438 1.727 2.664 0.24
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.632" Depth="0.122"/>
<TopsideChapman PeakHeight="373.254" PeakDensity="1831544.6" PeakScaleHeight="72.19" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
