<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-18 -049 13:40:00.000"
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" >
2026.02.18 (049) 13:40:00</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">
FF202604902181340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="8.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.666" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.796" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="7.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" 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="3.308" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.322" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="345.123" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="217.220" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.183" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="168.937" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.939" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="95.999" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="192.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.820" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="70">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 306.250 307.500 308.750 310.000 315.000 317.500 320.000 325.000 325.000 330.000 330.000 335.000 337.500 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 362.000 364.000 366.000 368.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 385.000 389.000 393.000 397.000 401.000 405.000 410.000 410.000 410.000 415.000 420.000 430.000 435.000 440.000 450.000 455.000 460.895 467.407 474.639 482.716 491.797 502.081 513.824 527.359 543.132 561.746 584.047 611.250 645.170 688.645
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 48 0 45 51 0 45 54 54 51 51 51 0 51 57 60 54 54 0 51 48 45 57 54 57 48 51 0 0 54 0 54 57 57 51 57 48 54 45 0 0 0 0 51 51 60 60 63 63 60 60 57 57 60 57 54 51 48 51 57 57 57 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -1.171875 0.390625 0.390625 2.734375 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 2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 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 1.171875 1.953125 -1.171875 2.734375 -1.953125 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" >
89.496 90.0 95.0 100.0 105.0 110.0 111.89 113.781 115.0 115.671 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 345.123 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.225 2.863 3.2 3.308 3.185 3.185 3.264 3.308 3.441 3.584 3.721 3.854 3.984 4.113 4.241 4.369 4.497 4.625 4.755 4.886 5.018 5.151 5.286 5.423 5.561 5.7 5.841 5.982 6.125 6.269 6.412 6.556 6.699 6.841 6.981 7.12 7.255 7.387 7.514 7.637 7.754 7.865 7.969 8.066 8.155 8.236 8.308 8.371 8.425 8.47 8.505 8.53 8.545 8.55 8.55 8.548 8.541 8.531 8.516 8.497 8.474 8.448 8.419 8.386 8.35 8.31 8.268 8.224 8.176 8.126 8.074 8.02 7.963 7.905 7.845 7.783 7.719 7.655 7.588 7.521 7.452 7.382 7.312 7.24 7.168 7.095 7.021 6.947 6.872 6.797 6.722 6.646 6.571 6.495 6.419 6.343 6.267 6.191 6.115 6.039 5.964 5.888 5.814 5.739 5.665 5.591 5.517 5.444 5.372 5.3 5.228 5.157 5.086 5.016 4.947 4.878 4.81 4.742 4.676 4.609 4.544 4.479 4.414 4.351 4.288 4.225 4.164 4.103 4.043 3.983 3.924 3.866 3.809 3.752 3.696 3.641 3.586 3.532 3.479 3.426 3.374 3.323 3.272 3.222 3.173 3.125 3.077 3.03 2.983 2.937 2.892 2.847 2.803 2.759 2.717 2.674 2.633 2.592 2.551 2.512 2.472 2.434 2.396 2.358 2.321 2.285 2.249 2.213 2.178 2.144 2.11 2.077 2.044 2.012 1.98 1.949 1.918 1.887 1.858 1.828 1.799 1.77 1.742 1.715 1.687 1.66

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.308" PeakHeight="110.0" Num="3" Error="0.0">
-30.441 13.063 -3.126
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.308" EndFrequency="8.55" PeakHeight="345.123" Num="5" zHalfNm="217.22" Error="4.433">
-216.733 -15.95 1.034 2.152 0.045
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.671" Depth="0.123"/>
<TopsideChapman PeakHeight="345.123" PeakDensity="906978.94" PeakScaleHeight="95.999" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
