<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 12:00:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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) 12:00:00</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">
FF202604202111200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.648" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.612" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.110" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="109.217" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="103.338" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="13.030" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="2.979" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.163" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="337.907" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.174" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.096" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="128.574" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.343" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.942" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="160.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.370" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="119">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
225.000 225.000 225.000 225.000 230.000 235.000 235.000 240.000 245.000 245.000 250.000 255.000 260.000 265.000 265.000 270.000 270.000 275.000 275.000 280.000 280.000 285.000 290.000 290.000 295.000 295.000 300.000 300.000 305.000 306.667 308.333 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 326.875 328.750 330.625 332.500 334.375 336.250 338.125 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 475.000 480.000 480.000 485.000 489.103 494.093 500.294 508.206 518.653 533.083 554.312 588.624
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 54 45 0 54 48 54 54 45 57 57 54 48 54 45 48 51 45 54 54 0 54 54 57 57 54 51 54 0 0 54 60 63 63 60 63 63 63 60 57 60 57 60 63 60 57 51 0 0 0 0 0 0 0 63 60 63 63 54 60 66 57 60 63 60 66 54 60 66 60 63 69 63 69 66 63 63 66 63 66 63 60 66 57 63 63 57 63 60 63 63 60 63 57 63 63 63 63 57 63 57 57 60 57 60 63 60 54 57 60 57 57 57 51 54 51 51 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 -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 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
109.217 109.790 110.412 111.094 111.848 112.691 113.649 114.763 116.097 117.774 120.068
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 0 0 0 54 48 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 0.390625 0.390625 -1.171875 0.390625 1.953125 -0.390625 0.390625 -0.390625 -0.390625
</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" >
90.0 95.0 100.0 103.338 105.0 106.65 109.963 110.0 113.275 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 337.907 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.4 3.004 3.11 3.078 2.983 2.983 2.984 3.11 3.157 3.29 3.421 3.553 3.685 3.82 3.956 4.096 4.239 4.386 4.536 4.69 4.848 5.009 5.174 5.342 5.513 5.687 5.864 6.042 6.222 6.404 6.586 6.769 6.953 7.137 7.321 7.504 7.687 7.87 8.051 8.232 8.411 8.589 8.764 8.937 9.106 9.27 9.428 9.576 9.713 9.834 9.933 10.005 10.044 10.05 10.049 10.041 10.023 9.997 9.963 9.922 9.873 9.818 9.756 9.688 9.615 9.536 9.453 9.365 9.273 9.178 9.079 8.977 8.872 8.765 8.655 8.544 8.43 8.316 8.2 8.083 7.965 7.847 7.728 7.609 7.49 7.37 7.251 7.133 7.014 6.896 6.779 6.662 6.546 6.432 6.318 6.205 6.093 5.982 5.872 5.764 5.657 5.551 5.446 5.343 5.241 5.141 5.042 4.944 4.848 4.754 4.66 4.569 4.478 4.39 4.302 4.216 4.132 4.049 3.967 3.887 3.808 3.731 3.655 3.58 3.507 3.435 3.364 3.295 3.227 3.16 3.095 3.031 2.968 2.906 2.846 2.786 2.728 2.671 2.615 2.56 2.507 2.454 2.402 2.352 2.302 2.254 2.206 2.16 2.114 2.069 2.026 1.983 1.941 1.9 1.859 1.82 1.781 1.743 1.706 1.67 1.635 1.6 1.566 1.532 1.5 1.468 1.436 1.406 1.376 1.346 1.318 1.29 1.262 1.235 1.209 1.183 1.158 1.133 1.109 1.085 1.062 1.039 1.017 0.995 0.974 0.953 0.932

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.11" PeakHeight="103.338" Num="3" Error="4.347">
-19.731 8.362 -1.969
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.11" EndFrequency="10.05" PeakHeight="337.907" Num="5" zHalfNm="239.174" Error="3.346">
-188.536 -45.423 11.797 -3.854 1.384
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.937" Depth="0.127"/>
<TopsideChapman PeakHeight="337.907" PeakDensity="1253132.8" PeakScaleHeight="71.942" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
