<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, F2 cusps do not match</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" >
2026.02.20 (051) 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">
FF202605102202200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.712" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.933" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.050" 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="0.397" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="393.078" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="340.670" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.910" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="78.412" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.251" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.796" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.540" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="148">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 316.250 317.500 318.750 320.000 320.000 315.000 315.000 315.000 315.000 318.333 321.667 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 336.250 337.500 338.750 340.000 340.714 341.429 342.143 342.857 343.571 344.286 345.000 345.000 350.000 350.000 350.000 350.000 352.500 355.000 352.500 350.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 360.000 360.000 361.667 363.333 365.000 366.000 367.000 368.000 369.000 370.000 372.500 375.000 377.500 380.000 380.833 381.667 382.500 383.333 384.167 385.000 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 396.667 398.333 400.000 400.000 401.250 402.500 403.750 405.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 425.000 430.000 430.000 432.500 435.000 435.000 437.500 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 447.500 450.000 450.000 450.000 452.500 455.000 460.000 460.000 460.000 460.000 460.000 465.000 466.667 468.333 470.000 471.667 473.333 475.000 475.000 475.000 475.000 480.000 487.321 495.356 504.216 514.033
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 60 57 0 0 0 60 69 0 0 57 0 0 0 72 81 75 0 0 0 0 0 0 0 63 0 63 0 69 69 69 0 0 0 60 0 0 60 0 0 0 66 69 57 0 66 66 0 63 0 60 69 0 0 0 69 78 84 84 75 0 0 60 0 0 0 0 69 0 0 0 51 0 0 0 45 0 57 66 66 54 72 69 69 63 63 0 0 57 60 0 0 0 66 51 57 63 69 66 66 69 69 63 66 66 0 66 66 57 60 0 57 57 0 54 0 63 60 57 60 57 60 0 60 0 57 0 57 51 0 0 60 0 60 0 0 60 0 0 54 0 54 57 57 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -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 -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 -2.734375 -1.171875 -0.390625 -1.171875 -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 -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 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="175">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.715 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.353 140.0 145.0 150.0 155.0 160.0 165.0 168.707 170.0 175.0 180.0 185.0 190.0 195.0 198.06 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.078 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.262 0.344 0.384 0.397 0.393 0.379 0.356 0.321 0.269 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.242 0.276 0.309 0.343 0.376 0.397 0.451 0.557 0.657 0.761 0.873 0.996 1.132 1.283 1.449 1.631 1.83 2.045 2.274 2.517 2.773 3.04 3.317 3.604 3.899 4.202 4.512 4.83 5.154 5.486 5.823 6.168 6.518 6.874 7.235 7.599 7.967 8.334 8.698 9.054 9.392 9.702 9.967 10.167 10.28 10.3 10.298 10.269 10.211 10.126 10.017 9.887 9.738 9.573 9.393 9.202 9.001 8.791 8.576 8.356 8.132 7.907 7.68 7.454 7.228 7.004 6.783 6.564 6.349 6.137 5.929 5.726 5.528 5.334 5.146 4.962 4.783 4.61 4.442 4.279 4.121 3.967 3.819 3.676 3.538 3.404 3.275 3.151 3.03 2.914 2.803 2.695 2.591 2.491 2.395 2.302 2.213 2.127 2.044 1.965 1.888 1.814 1.744 1.675 1.61 1.547 1.486 1.428 1.372 1.318 1.267 1.217 1.169 1.123 1.079 1.036 0.996 0.957 0.919 0.883 0.848 0.815 0.782 0.752 0.722 0.694 0.666 0.64 0.615 0.591 0.567 0.545 0.523 0.503 0.483 0.464 0.446 0.428 0.411 0.395 0.379 0.364 0.35 0.336 0.323 0.31 0.298 0.286 0.275 0.264 0.254 0.244 0.234 0.225 0.216 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.397" PeakHeight="110.0" Num="3" Error="0.0">
-20.135 3.063 -0.213
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.397" EndFrequency="10.3" PeakHeight="393.078" Num="5" zHalfNm="340.67" Error="3.998">
-181.264 -27.721 17.721 -6.751 2.997
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="88.06" Depth="0.197"/>
<TopsideChapman PeakHeight="393.078" PeakDensity="1316253.1" PeakScaleHeight="38.796" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
