<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 12:00:00.000"
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) 12:00:00</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">
FF202605002191200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.691" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.316" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="2.988" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.168" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="339.142" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.165" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.096" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="119.519" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.714" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.239" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.510" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 235.000 238.000 241.000 244.000 247.000 250.000 260.000 265.000 265.000 270.000 275.000 280.000 280.000 283.333 286.667 290.000 295.000 300.000 300.000 300.000 302.500 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 469.715 475.200 481.661 489.382 498.774 510.443 525.333 544.991 572.142
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 45 0 51 0 0 57 51 51 57 54 48 45 51 0 0 51 48 45 51 57 51 57 45 54 57 54 60 60 60 57 57 60 60 57 60 60 54 0 57 57 54 60 60 63 63 66 66 66 63 66 66 63 66 69 60 63 51 0 63 66 66 63 69 63 69 72 69 69 72 66 69 63 69 72 66 69 63 69 66 69 69 66 54 60 48 57 63 57 66 69 66 69 69 66 69 66 66 63 63 63 60 63 60 60 60 60 60 60 60 54 57 57 57 54 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</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" >
89.547 90.0 95.0 100.0 105.0 110.0 113.272 115.0 116.543 119.815 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 339.142 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.009 2.586 2.891 2.988 2.866 2.866 2.866 2.988 2.993 3.138 3.282 3.427 3.573 3.719 3.867 4.016 4.166 4.319 4.473 4.629 4.787 4.947 5.109 5.274 5.441 5.61 5.782 5.956 6.133 6.313 6.495 6.679 6.866 7.056 7.248 7.442 7.639 7.837 8.037 8.238 8.439 8.64 8.839 9.036 9.227 9.412 9.585 9.745 9.885 10.0 10.086 10.137 10.15 10.15 10.143 10.125 10.098 10.061 10.015 9.962 9.9 9.831 9.756 9.674 9.587 9.494 9.396 9.294 9.188 9.078 8.965 8.849 8.731 8.61 8.487 8.363 8.237 8.111 7.983 7.855 7.726 7.597 7.469 7.34 7.211 7.084 6.956 6.829 6.704 6.579 6.455 6.332 6.21 6.09 5.971 5.854 5.737 5.623 5.51 5.398 5.288 5.18 5.073 4.968 4.865 4.763 4.663 4.565 4.468 4.373 4.28 4.188 4.098 4.01 3.923 3.838 3.754 3.673 3.592 3.514 3.437 3.361 3.287 3.214 3.143 3.074 3.005 2.939 2.873 2.809 2.746 2.685 2.625 2.566 2.509 2.452 2.397 2.343 2.29 2.239 2.188 2.139 2.09 2.043 1.997 1.952 1.907 1.864 1.822 1.781 1.74 1.701 1.662 1.624 1.587 1.551 1.516 1.481 1.447 1.414 1.382 1.351 1.32 1.29 1.26 1.231 1.203 1.176 1.149 1.123 1.097 1.072 1.047 1.023 1.0 0.977 0.955 0.933 0.911 0.891 0.87 0.85 0.831 0.812 0.793 0.775

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.988" PeakHeight="110.0" Num="3" Error="0.0">
-30.185 12.687 -2.955
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.988" EndFrequency="10.15" PeakHeight="339.142" Num="5" zHalfNm="248.165" Error="2.666">
-183.412 -45.966 10.678 -0.72 0.093
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.815" Depth="0.122"/>
<TopsideChapman PeakHeight="339.142" PeakDensity="1278194.8" PeakScaleHeight="67.239" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
