<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 17:00:00.000"
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: 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) 17:00:00</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">
FF202604202111700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.329" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.409" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" 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="3.261" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.300" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="384.968" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.776" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.110" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="159.804" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.357" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="88.220" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="212.320" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
260.000 265.000 270.000 275.000 280.000 285.000 290.000 295.000 300.000 300.000 302.500 305.000 310.000 315.000 320.000 325.000 325.000 330.000 332.500 335.000 340.000 341.250 342.500 343.750 345.000 350.000 350.000 355.000 360.000 361.667 363.333 365.000 365.000 367.500 370.000 372.500 375.000 375.000 380.000 385.000 387.500 390.000 390.000 390.000 392.500 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 475.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 535.000 540.000 545.000 550.000 555.000 557.500 560.000 562.500 565.000 570.000 572.500 575.000 580.000 585.000 590.000 595.000 599.041 603.748 609.299 615.943 624.041 634.127 647.034
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 0 0 0 0 45 48 0 45 48 51 0 45 51 51 0 51 51 0 0 0 45 54 45 0 51 0 0 54 51 0 0 0 54 54 0 51 0 51 57 63 0 60 60 63 51 60 54 60 51 60 51 57 48 54 60 57 60 63 54 54 57 57 57 57 54 54 60 51 54 57 57 57 54 51 60 60 60 60 57 60 60 60 54 45 0 57 0 63 60 0 60 57 57 57 57 54 54 51 48 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.171875 1.171875 1.171875 -1.171875 1.953125 -0.390625 2.734375 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 -2.734375 -0.390625 -0.390625 0.390625 1.171875 -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 -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 -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
</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" >
89.503 90.0 95.0 100.0 105.0 110.0 112.086 114.172 115.0 116.258 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.968 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.193 2.822 3.155 3.261 3.139 3.139 3.187 3.261 3.356 3.48 3.602 3.724 3.847 3.972 4.1 4.23 4.364 4.5 4.64 4.782 4.926 5.072 5.219 5.367 5.515 5.663 5.81 5.956 6.1 6.243 6.383 6.522 6.659 6.795 6.928 7.06 7.19 7.319 7.446 7.572 7.697 7.821 7.944 8.066 8.188 8.309 8.43 8.55 8.67 8.791 8.911 9.032 9.153 9.274 9.395 9.515 9.634 9.751 9.86 9.955 10.024 10.05 10.05 10.047 10.038 10.023 10.002 9.976 9.944 9.908 9.867 9.822 9.772 9.719 9.661 9.6 9.536 9.468 9.398 9.324 9.248 9.17 9.089 9.006 8.922 8.835 8.747 8.658 8.567 8.475 8.382 8.289 8.194 8.099 8.003 7.906 7.81 7.713 7.616 7.518 7.421 7.324 7.227 7.13 7.033 6.937 6.841 6.746 6.651 6.556 6.463 6.369 6.277 6.185 6.094 6.003 5.913 5.825 5.737 5.649 5.563 5.478 5.393 5.309 5.227 5.145 5.064 4.984 4.905 4.827 4.75 4.674 4.599 4.525 4.451 4.379 4.308 4.238 4.168 4.1 4.033 3.966 3.901 3.836 3.773 3.71 3.648 3.587 3.527 3.468 3.41 3.353 3.296 3.241 3.186 3.132 3.079 3.027 2.976 2.925 2.875 2.826 2.778 2.731 2.684 2.638 2.593 2.549 2.505 2.462 2.42 2.378 2.337 2.297 2.258 2.219 2.18 2.143 2.106 2.069 2.034 1.999 1.964 1.93 1.897 1.864

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.261" PeakHeight="110.0" Num="3" Error="0.0">
-30.405 13.01 -3.102
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.261" EndFrequency="10.05" PeakHeight="384.968" Num="5" zHalfNm="256.776" Error="4.768">
-222.046 -69.626 32.965 -13.461 3.458
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.258" Depth="0.122"/>
<TopsideChapman PeakHeight="384.968" PeakDensity="1253132.8" PeakScaleHeight="88.22" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
