<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 13:00:00.000"
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" >
2026.02.17 (048) 13:00:00</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">
FF202604802171300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.674" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.211" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" 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="10.150" 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="3.209" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.276" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="335.330" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.681" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.082" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.508" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.227" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.140" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 200.000 205.000 208.125 211.250 214.375 217.500 220.625 223.750 226.875 230.000 235.000 240.000 247.500 255.000 260.000 265.000 270.000 280.000 275.000 282.500 290.000 285.000 290.000 295.000 295.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 335.000 337.500 340.000 340.000 343.333 346.667 350.000 350.000 355.000 355.000 355.000 357.500 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 475.000 485.000 490.000 495.000 503.700 514.098 526.745 542.458 562.509
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 54 0 48 0 0 0 0 0 51 51 51 0 54 54 51 57 45 48 0 45 51 0 57 60 57 60 51 57 0 60 60 51 60 63 60 0 0 0 63 60 57 63 60 60 63 60 57 60 66 63 60 57 0 66 63 57 48 63 63 0 66 63 0 0 60 63 54 57 63 0 63 66 63 66 57 63 54 63 66 63 66 57 48 57 60 57 63 54 63 63 63 63 60 66 60 60 60 60 54 60 60 57 60 57 57 54 57 54 60 54 57 57 54 57 54 57 54 54 51 51 48 51 48 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 1.171875 0.390625 -1.171875 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 -0.390625 0.390625 -0.390625 -1.953125
</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" >
89.511 90.0 95.0 100.0 105.0 110.0 112.304 114.609 115.0 116.913 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 335.33 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.158 2.777 3.105 3.209 3.087 3.087 3.108 3.209 3.302 3.451 3.6 3.748 3.898 4.049 4.203 4.359 4.518 4.68 4.844 5.012 5.182 5.355 5.53 5.709 5.889 6.071 6.256 6.442 6.63 6.819 7.01 7.202 7.395 7.589 7.783 7.979 8.174 8.37 8.566 8.762 8.958 9.152 9.344 9.533 9.718 9.896 10.064 10.217 10.35 10.455 10.524 10.55 10.55 10.545 10.53 10.504 10.469 10.425 10.373 10.312 10.244 10.169 10.087 10.0 9.907 9.809 9.706 9.598 9.488 9.373 9.255 9.135 9.012 8.888 8.761 8.633 8.503 8.373 8.242 8.11 7.978 7.846 7.714 7.582 7.45 7.319 7.189 7.059 6.93 6.803 6.676 6.55 6.426 6.303 6.181 6.061 5.942 5.825 5.709 5.595 5.482 5.371 5.262 5.154 5.048 4.944 4.842 4.741 4.642 4.544 4.449 4.355 4.262 4.172 4.083 3.995 3.91 3.826 3.743 3.662 3.583 3.505 3.429 3.354 3.281 3.209 3.139 3.07 3.003 2.937 2.872 2.809 2.747 2.686 2.626 2.568 2.511 2.456 2.401 2.348 2.295 2.244 2.194 2.145 2.097 2.05 2.005 1.96 1.916 1.873 1.831 1.79 1.75 1.71 1.672 1.634 1.598 1.562 1.527 1.492 1.459 1.426 1.394 1.362 1.332 1.302 1.272 1.244 1.216 1.188 1.161 1.135 1.109 1.084 1.06 1.036 1.013 0.99 0.967 0.945 0.924 0.903 0.883 0.863 0.843 0.824

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.209" PeakHeight="110.0" Num="3" Error="0.0">
-30.365 12.951 -3.075
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.209" EndFrequency="10.55" PeakHeight="335.33" Num="5" zHalfNm="241.681" Error="4.939">
-181.681 -47.877 13.365 -3.135 0.911
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.913" Depth="0.122"/>
<TopsideChapman PeakHeight="335.33" PeakDensity="1380924.4" PeakScaleHeight="68.14" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
