<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 21:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.02.13 (044) 21:00:00</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">
FF202604402132100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.535" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.028" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.443" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.260" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="316.375" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.236" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="111.055" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.593" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.618" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="180">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 265.625 266.250 266.875 267.500 268.125 268.750 269.375 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 287.500 290.000 292.500 295.000 295.000 296.000 297.000 298.000 299.000 300.000 302.500 305.000 305.000 307.500 310.000 310.000 310.000 311.667 313.333 315.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 321.667 323.333 325.000 325.000 325.000 326.667 328.333 330.000 330.000 335.000 337.500 340.000 340.000 341.667 343.333 345.000 345.000 350.000 351.250 352.500 353.750 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 387.500 390.000 390.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 416.667 418.333 420.000 420.000 425.000 425.000 425.000 427.500 430.000 430.000 430.000 435.000 437.500 440.000 440.000 440.000 442.500 445.000 445.000 447.500 450.000 455.000 455.000 455.000 457.500 460.000 460.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 475.000 476.250 477.500 478.750 480.000 485.000 485.000 487.500 490.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 505.000 505.000 510.000 515.000 520.000 520.000 520.000 520.000 525.000 530.000 531.667 533.333 535.000 535.000 535.000 539.145 544.434 551.416 561.061
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 0 0 0 57 54 51 54 0 0 57 0 51 57 60 60 54 57 60 60 0 54 54 48 0 54 0 54 60 0 0 0 0 63 0 60 60 0 51 0 63 0 51 57 69 66 0 72 84 81 72 72 0 0 0 0 0 0 0 72 0 66 0 60 66 0 0 63 66 54 0 0 0 63 66 57 63 69 60 66 72 69 69 72 66 72 72 69 69 63 69 69 0 72 66 69 60 69 60 66 72 72 69 57 63 0 0 66 69 57 0 69 54 63 66 69 63 51 60 66 69 60 66 69 60 69 57 0 69 54 63 66 69 66 66 66 66 63 63 57 0 0 0 60 54 57 0 57 60 60 57 60 60 60 48 0 57 51 57 54 45 54 60 54 51 45 0 0 54 45 48 48 0 0 48
</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" >
89.962 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.69 125.0 130.0 133.381 135.0 140.0 145.0 145.071 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.26 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.203 0.964 1.25 1.397 1.443 1.417 1.335 1.294 1.294 1.294 1.294 1.315 1.378 1.442 1.443 1.537 1.634 1.733 1.836 1.945 2.061 2.185 2.32 2.466 2.625 2.798 2.986 3.188 3.404 3.631 3.867 4.109 4.354 4.599 4.844 5.087 5.328 5.565 5.8 6.031 6.26 6.487 6.712 6.935 7.156 7.377 7.597 7.816 8.036 8.256 8.477 8.699 8.922 9.147 9.375 9.605 9.838 10.074 10.313 10.554 10.794 11.029 11.242 11.4 11.45 11.45 11.438 11.409 11.363 11.302 11.227 11.138 11.038 10.927 10.805 10.675 10.537 10.391 10.239 10.082 9.919 9.753 9.583 9.41 9.235 9.059 8.881 8.702 8.523 8.344 8.166 7.988 7.811 7.636 7.462 7.289 7.119 6.951 6.785 6.621 6.46 6.301 6.145 5.991 5.84 5.693 5.548 5.405 5.266 5.13 4.996 4.865 4.737 4.613 4.49 4.371 4.254 4.141 4.03 3.921 3.815 3.712 3.611 3.513 3.418 3.324 3.233 3.145 3.059 2.975 2.893 2.813 2.735 2.66 2.586 2.515 2.445 2.377 2.311 2.247 2.184 2.124 2.065 2.007 1.951 1.897 1.844 1.792 1.742 1.693 1.646 1.6 1.555 1.511 1.469 1.428 1.388 1.349 1.311 1.274 1.238 1.204 1.17 1.137 1.105 1.074 1.044 1.014 0.986 0.958 0.931 0.905 0.88 0.855 0.831 0.807 0.785 0.763 0.741 0.72 0.7 0.68 0.661 0.642 0.624 0.607 0.59

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.443" PeakHeight="110.0" Num="3" Error="0.0">
-27.987 9.715 -1.766
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.443" EndFrequency="11.45" PeakHeight="394.26" Num="5" zHalfNm="316.375" Error="5.131">
-207.039 -60.801 31.794 -18.404 5.261
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.071" Depth="0.149"/>
<TopsideChapman PeakHeight="394.26" PeakDensity="1626581.9" PeakScaleHeight="54.618" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
