<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 22:00:00.000"
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" >
2026.02.16 (047) 22:00:00</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">
FF202604702162200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.676" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.890" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="487.221" 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="0.405" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.358" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="340.677" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.910" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.951" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.589" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.687" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="160">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 306.250 307.500 308.750 310.000 305.000 305.000 305.000 310.000 310.000 310.000 311.667 313.333 315.000 320.000 320.455 320.909 321.364 321.818 322.273 322.727 323.182 323.636 324.091 324.545 325.000 325.000 325.000 325.000 325.000 325.000 326.429 327.857 329.286 330.714 332.143 333.571 335.000 335.000 337.500 340.000 340.000 337.500 335.000 335.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 362.500 365.000 367.500 370.000 370.000 370.000 370.000 371.250 372.500 373.750 375.000 375.000 376.667 378.333 380.000 381.667 383.333 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 396.250 397.500 398.750 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 452.500 455.000 460.000 460.000 465.000 465.000 465.000 467.500 470.000 475.000 476.410 478.005 479.824 481.917 484.352 487.221 490.649 494.819 500.000 506.611 515.339
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 69 0 0 0 66 66 57 57 69 0 69 0 0 69 54 0 0 0 0 0 0 0 0 0 0 63 63 0 0 0 63 0 57 0 60 0 0 51 54 0 51 54 0 57 0 0 48 51 57 57 0 60 63 0 54 60 0 63 51 63 0 0 63 0 63 0 0 0 66 57 66 0 0 0 54 0 63 66 0 0 0 60 63 0 0 57 0 0 54 57 63 66 51 57 60 63 51 66 63 63 63 0 0 0 66 66 63 66 66 66 66 69 66 60 66 69 60 63 66 54 0 66 69 60 63 63 57 63 63 57 63 66 57 63 54 60 63 57 63 57 60 57 60 60 0 60 57 57 0 0 60 0 54 0 54 54 51 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="178">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.601 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.251 140.0 145.0 150.0 155.0 160.0 165.0 168.503 170.0 175.0 180.0 185.0 190.0 195.0 197.754 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.358 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.268 0.351 0.392 0.405 0.4 0.387 0.363 0.326 0.271 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.246 0.281 0.316 0.351 0.386 0.405 0.46 0.554 0.642 0.732 0.829 0.936 1.053 1.185 1.331 1.495 1.677 1.878 2.098 2.335 2.588 2.856 3.136 3.426 3.726 4.034 4.348 4.669 4.996 5.329 5.666 6.008 6.355 6.705 7.058 7.414 7.77 8.125 8.475 8.815 9.138 9.435 9.691 9.89 10.014 10.05 10.05 10.031 9.983 9.91 9.814 9.697 9.561 9.409 9.243 9.066 8.878 8.682 8.48 8.272 8.06 7.846 7.631 7.414 7.199 6.984 6.771 6.56 6.352 6.148 5.947 5.75 5.557 5.368 5.184 5.004 4.83 4.66 4.494 4.334 4.178 4.027 3.881 3.739 3.602 3.47 3.342 3.218 3.098 2.983 2.871 2.764 2.66 2.56 2.463 2.37 2.28 2.194 2.111 2.03 1.953 1.879 1.807 1.738 1.672 1.608 1.546 1.487 1.43 1.375 1.323 1.272 1.223 1.176 1.131 1.087 1.046 1.005 0.967 0.929 0.894 0.859 0.826 0.794 0.764 0.734 0.706 0.679 0.653 0.628 0.603 0.58 0.558 0.536 0.516 0.496 0.477 0.458 0.44 0.423 0.407 0.391 0.376 0.362 0.348 0.334 0.322 0.309 0.297 0.286 0.275 0.264 0.254 0.244 0.235 0.226 0.217 0.209 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.405" PeakHeight="110.0" Num="3" Error="0.0">
-20.347 3.175 -0.227
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.405" EndFrequency="10.05" PeakHeight="394.358" Num="5" zHalfNm="340.677" Error="4.159">
-181.564 -26.461 14.469 -6.558 3.51
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.754" Depth="0.205"/>
<TopsideChapman PeakHeight="394.358" PeakDensity="1253132.8" PeakScaleHeight="39.687" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
