<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 16:40:00.000"
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: 90% PACIFIC flags: 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) 16:40:00</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">
FF202604702161640009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.561" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.635" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.750" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" 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="3.309" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.323" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="356.015" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="258.106" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.979" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="119.366" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.913" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.098" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="178.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="119">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 220.000 225.000 225.000 235.000 240.000 245.000 250.000 255.000 260.000 265.000 270.000 274.000 278.000 282.000 286.000 290.000 295.000 298.125 301.250 304.375 307.500 310.625 313.750 316.875 320.000 320.000 325.000 325.000 330.000 335.000 335.000 337.500 340.000 342.500 345.000 345.000 350.000 351.667 353.333 355.000 356.667 358.333 360.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 387.500 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 437.500 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 475.000 480.000 480.000 480.000 485.000 485.000 485.000 490.000 492.000 494.000 496.000 498.000 500.000 500.000 505.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 535.000 542.786 552.721
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 57 57 45 54 57 57 51 0 48 48 45 0 45 0 0 45 45 0 0 0 0 0 0 0 45 48 0 51 51 45 48 0 0 0 51 54 54 0 48 0 0 0 54 54 51 57 51 54 51 54 48 0 48 54 57 57 60 57 57 57 60 60 60 60 63 57 63 63 63 63 63 54 63 0 63 54 60 54 57 54 60 51 60 60 57 63 54 60 51 0 57 60 60 63 63 60 63 60 57 0 0 0 0 51 57 51 57 57 54 51 54 51 45 51 51 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -1.171875 0.390625 -0.390625 1.953125 -0.390625 0.390625 -2.734375 0.390625 0.390625 -0.390625 0.390625 -0.390625 1.171875 -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 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 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 1.171875
</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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.885 113.769 115.0 115.654 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.015 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.226 2.864 3.201 3.309 3.186 3.186 3.266 3.309 3.407 3.526 3.651 3.782 3.917 4.057 4.199 4.344 4.491 4.638 4.786 4.934 5.082 5.23 5.377 5.524 5.67 5.816 5.961 6.106 6.251 6.395 6.539 6.683 6.828 6.972 7.118 7.263 7.409 7.557 7.705 7.854 8.005 8.157 8.311 8.467 8.626 8.787 8.951 9.118 9.288 9.462 9.64 9.82 10.0 10.173 10.32 10.397 10.4 10.397 10.383 10.359 10.326 10.283 10.233 10.174 10.108 10.035 9.955 9.869 9.778 9.682 9.581 9.476 9.367 9.254 9.139 9.02 8.9 8.777 8.652 8.526 8.398 8.27 8.14 8.011 7.88 7.75 7.62 7.489 7.36 7.23 7.102 6.974 6.846 6.72 6.595 6.471 6.348 6.227 6.106 5.988 5.87 5.754 5.64 5.527 5.416 5.306 5.198 5.092 4.987 4.884 4.783 4.684 4.586 4.489 4.395 4.302 4.211 4.121 4.033 3.947 3.862 3.779 3.698 3.618 3.539 3.463 3.387 3.313 3.241 3.17 3.101 3.033 2.966 2.901 2.837 2.774 2.713 2.653 2.594 2.537 2.48 2.425 2.371 2.319 2.267 2.216 2.167 2.119 2.071 2.025 1.98 1.935 1.892 1.85 1.808 1.767 1.728 1.689 1.651 1.614 1.578 1.542 1.507 1.474 1.44 1.408 1.376 1.345 1.315 1.285 1.256 1.228 1.2 1.173 1.147 1.121 1.095 1.071 1.046 1.023 1.0 0.977 0.955 0.933 0.912 0.892

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.309" PeakHeight="110.0" Num="3" Error="0.0">
-30.442 13.064 -3.127
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.309" EndFrequency="10.4" PeakHeight="356.015" Num="5" zHalfNm="258.106" Error="2.679">
-183.222 -78.442 28.021 -6.841 0.123
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.654" Depth="0.123"/>
<TopsideChapman PeakHeight="356.015" PeakDensity="1341935.5" PeakScaleHeight="68.098" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
