<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 21:40:00.000"
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" >
2026.02.11 (042) 21:40:00</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">
FF202604202112140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.505" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.169" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.986" 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="0.645" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="416.154" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="342.646" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.032" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.400" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.968" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.257" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="147">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 320.000 318.333 316.667 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 321.667 323.333 325.000 330.000 331.000 332.000 333.000 334.000 335.000 336.000 337.000 338.000 339.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.625 346.250 346.875 347.500 348.125 348.750 349.375 350.000 352.500 355.000 355.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 365.000 367.500 370.000 370.000 370.000 372.500 375.000 370.000 370.000 370.000 370.000 375.000 380.000 380.000 382.500 385.000 385.000 386.667 388.333 390.000 390.000 390.000 391.250 392.500 393.750 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 412.500 415.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 431.250 432.500 433.750 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 495.000 495.000 500.000 505.000 505.000 510.000 515.000 515.000 515.000 517.796 520.986 524.656 528.926 533.955 539.966 547.277 556.361 567.952 583.254 604.388
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 66 0 63 0 0 0 0 63 60 57 48 69 66 66 0 0 72 66 0 0 0 0 0 0 0 0 0 54 0 54 0 0 0 60 0 0 66 0 0 0 0 66 0 60 0 66 0 0 0 63 48 66 60 0 51 0 63 0 51 66 63 0 0 0 63 66 0 60 63 0 0 60 63 63 0 0 0 66 60 63 63 60 63 66 60 0 57 60 63 63 60 63 57 63 66 60 0 0 0 66 66 66 66 63 66 63 69 57 66 57 63 66 0 54 66 57 69 72 69 69 69 63 69 66 72 69 63 69 66 60 66 63 63 63 63 60 60 57 57 57 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 2.734375 2.734375 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.936 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.85 140.0 145.0 150.0 155.0 160.0 161.699 165.0 170.0 175.0 180.0 185.0 187.549 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 416.154 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.428 0.559 0.624 0.645 0.636 0.607 0.557 0.477 0.346 0.314 0.314 0.314 0.314 0.314 0.314 0.314 0.356 0.42 0.484 0.548 0.612 0.645 0.701 0.797 0.888 0.979 1.074 1.175 1.283 1.4 1.527 1.666 1.818 1.983 2.163 2.357 2.565 2.785 3.015 3.256 3.503 3.757 4.015 4.276 4.54 4.806 5.074 5.341 5.61 5.879 6.147 6.415 6.683 6.949 7.213 7.475 7.733 7.987 8.234 8.473 8.701 8.915 9.112 9.285 9.431 9.543 9.617 9.649 9.65 9.645 9.626 9.592 9.545 9.485 9.414 9.332 9.241 9.14 9.032 8.917 8.795 8.668 8.535 8.399 8.258 8.115 7.969 7.821 7.672 7.521 7.369 7.218 7.066 6.914 6.763 6.613 6.464 6.316 6.17 6.025 5.882 5.74 5.601 5.464 5.329 5.196 5.066 4.938 4.812 4.688 4.568 4.449 4.333 4.22 4.109 4.0 3.894 3.79 3.689 3.59 3.493 3.399 3.307 3.217 3.129 3.044 2.961 2.879 2.8 2.723 2.648 2.575 2.504 2.434 2.367 2.301 2.237 2.175 2.114 2.055 1.998 1.942 1.888 1.835 1.784 1.733 1.685 1.638 1.592 1.547 1.503 1.461 1.42 1.38 1.341 1.303 1.266 1.231 1.196 1.162 1.129 1.097 1.066 1.036 1.007 0.979 0.951 0.924 0.898 0.872 0.848 0.824 0.8 0.778 0.756 0.734 0.713 0.693 0.674 0.655 0.636 0.618 0.6 0.583 0.567 0.551

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.645" PeakHeight="110.0" Num="3" Error="0.0">
-24.149 5.747 -0.662
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.645" EndFrequency="9.65" PeakHeight="416.154" Num="5" zHalfNm="342.646" Error="4.112">
-215.393 -21.708 11.387 -6.508 3.617
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.549" Depth="0.331"/>
<TopsideChapman PeakHeight="416.154" PeakDensity="1155366.0" PeakScaleHeight="54.257" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
