<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 20:40:00.000"
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 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" >
2026.02.15 (046) 20:40:00</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">
FF202604602152040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.637" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.560" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.810" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="356.412" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.025" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.323" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="111.497" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.363" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.822" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="124.780" 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="159">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 266.000 267.000 268.000 269.000 270.000 275.000 277.500 280.000 278.333 276.667 275.000 275.000 278.333 281.667 285.000 285.000 285.000 285.000 285.000 285.000 285.000 287.500 290.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 302.500 305.000 305.000 305.000 307.500 310.000 312.500 315.000 315.000 315.000 317.500 320.000 320.000 322.500 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 357.500 360.000 362.500 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 457.500 460.000 465.000 467.500 470.000 472.500 475.000 477.500 480.000 482.500 485.000 490.000 492.500 495.000 497.500 500.000 505.000 505.000 510.000 516.383 523.602
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 60 69 60 60 0 0 60 63 60 54 66 60 60 66 63 0 66 69 66 63 60 60 57 66 0 60 60 57 57 54 0 0 0 0 63 66 0 0 0 0 60 51 0 0 57 0 63 63 63 60 57 0 63 60 0 66 57 60 0 66 0 66 54 69 0 69 0 63 66 69 0 63 66 0 60 63 66 60 0 66 63 66 57 63 66 66 63 69 60 66 54 63 66 0 0 0 63 69 63 69 63 69 69 66 69 66 69 66 57 66 69 66 69 63 69 60 66 60 66 66 66 69 63 66 63 69 66 66 60 51 60 66 57 63 51 60 66 0 63 60 0 0 0 0 0 0 0 54 51 0 54 48 51 48 51 48 48 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" >
89.818 90.0 95.0 100.0 105.0 110.0 115.0 119.293 120.0 125.0 128.587 130.0 135.0 137.88 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.412 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.212 1.568 1.752 1.81 1.771 1.673 1.673 1.673 1.673 1.694 1.768 1.81 1.861 1.974 2.082 2.19 2.301 2.417 2.54 2.673 2.818 2.977 3.154 3.352 3.574 3.82 4.09 4.375 4.667 4.959 5.243 5.518 5.781 6.034 6.278 6.513 6.74 6.961 7.177 7.388 7.596 7.8 8.002 8.203 8.402 8.6 8.799 8.998 9.197 9.398 9.6 9.802 10.001 10.192 10.354 10.445 10.45 10.446 10.427 10.393 10.345 10.284 10.212 10.128 10.034 9.931 9.82 9.701 9.575 9.443 9.306 9.164 9.018 8.869 8.717 8.562 8.406 8.248 8.089 7.929 7.769 7.61 7.45 7.292 7.134 6.977 6.821 6.667 6.515 6.364 6.216 6.069 5.925 5.782 5.643 5.505 5.37 5.237 5.106 4.979 4.853 4.73 4.61 4.492 4.377 4.264 4.154 4.046 3.941 3.838 3.737 3.639 3.543 3.449 3.358 3.269 3.182 3.097 3.014 2.933 2.855 2.778 2.703 2.631 2.56 2.49 2.423 2.358 2.294 2.231 2.171 2.112 2.054 1.999 1.944 1.891 1.839 1.789 1.74 1.693 1.647 1.601 1.558 1.515 1.473 1.433 1.394 1.356 1.318 1.282 1.247 1.213 1.179 1.147 1.116 1.085 1.055 1.026 0.998 0.97 0.944 0.918 0.892 0.868 0.844 0.821 0.798 0.776 0.755 0.734 0.714 0.694 0.675 0.656 0.638 0.621 0.604 0.587 0.571 0.555 0.54 0.525 0.51 0.496 0.483 0.469

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.81" PeakHeight="110.0" Num="3" Error="0.0">
-28.752 10.697 -2.127
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.81" EndFrequency="10.45" PeakHeight="356.412" Num="5" zHalfNm="275.025" Error="5.101">
-182.696 -48.711 24.724 -18.656 6.807
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.88" Depth="0.137"/>
<TopsideChapman PeakHeight="356.412" PeakDensity="1354869.8" PeakScaleHeight="55.822" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
