<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 11:20:00.000"
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) 11:20:00</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">
FF202604202111120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.785" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.596" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.350" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.510" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.000" 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="24" Val="113.677" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="135.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.741" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.549" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" 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="2.765" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="324.098" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.749" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.083" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.400" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="129.528" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.465" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.060" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="141.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.830" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.550" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 220.000 222.500 225.000 225.000 225.000 225.000 225.000 230.000 232.500 235.000 235.000 240.000 240.000 245.000 247.500 250.000 250.000 250.000 255.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 280.000 280.000 280.000 280.000 285.000 286.667 288.333 290.000 290.000 292.000 294.000 296.000 298.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 332.500 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 405.000 405.000 410.000 410.000 420.000 425.000 430.000 435.000 435.000 440.000 444.256 449.270 455.262 462.550 471.606 483.162 498.418 519.491 550.491 600.593
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 54 51 48 0 0 0 51 54 0 54 63 63 60 63 0 54 57 54 60 60 57 63 0 51 63 63 57 60 63 66 51 48 0 0 60 0 0 63 57 0 0 0 69 66 0 63 0 0 54 63 66 0 54 0 63 60 57 66 69 60 60 66 63 63 63 63 57 63 51 60 0 57 63 63 57 60 63 63 66 63 60 51 63 66 63 69 66 66 63 63 66 63 66 66 63 69 63 57 63 63 63 66 63 60 57 51 54 63 60 54 60 63 60 60 57 60 57 51 45
</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 -2.734375 1.953125 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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 2.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
113.677 114.254 114.881 115.568
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.953125 -1.953125 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.4 3.45 3.5 3.55 3.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
145.000 150.000 146.667 143.333 140.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 -1.953125 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 95.0 100.0 100.741 105.0 105.036 109.331 110.0 113.626 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.098 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.107 2.504 2.51 2.401 2.399 2.399 2.416 2.51 2.55 2.695 2.838 2.982 3.127 3.276 3.427 3.583 3.744 3.91 4.081 4.257 4.44 4.628 4.823 5.022 5.228 5.438 5.652 5.87 6.091 6.315 6.539 6.764 6.988 7.211 7.431 7.647 7.857 8.061 8.258 8.446 8.623 8.789 8.942 9.081 9.204 9.31 9.398 9.466 9.515 9.543 9.55 9.55 9.544 9.529 9.506 9.474 9.436 9.39 9.338 9.279 9.214 9.144 9.069 8.99 8.906 8.817 8.726 8.631 8.533 8.432 8.329 8.223 8.116 8.007 7.897 7.785 7.673 7.559 7.445 7.331 7.216 7.102 6.987 6.872 6.758 6.644 6.531 6.418 6.306 6.195 6.085 5.975 5.867 5.759 5.653 5.548 5.444 5.341 5.24 5.14 5.041 4.944 4.848 4.753 4.66 4.568 4.477 4.388 4.301 4.215 4.13 4.046 3.964 3.884 3.805 3.727 3.651 3.576 3.502 3.43 3.359 3.289 3.221 3.153 3.088 3.023 2.96 2.898 2.837 2.777 2.719 2.661 2.605 2.55 2.496 2.443 2.391 2.34 2.29 2.242 2.194 2.147 2.101 2.056 2.012 1.969 1.927 1.886 1.845 1.806 1.767 1.729 1.692 1.656 1.62 1.585 1.551 1.518 1.485 1.453 1.422 1.391 1.361 1.331 1.303 1.275 1.247 1.22 1.194 1.168 1.143 1.118 1.094 1.07 1.047 1.024 1.002 0.98 0.959 0.938 0.918 0.898 0.879 0.86 0.841 0.823 0.805

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.51" PeakHeight="100.741" Num="3" Error="5.109">
-15.679 6.343 -1.405
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.51" EndFrequency="9.55" PeakHeight="324.098" Num="5" zHalfNm="229.749" Error="1.645">
-193.593 -18.653 1.06 0.159 0.555
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.885" Depth="0.111"/>
<TopsideChapman PeakHeight="324.098" PeakDensity="1131544.6" PeakScaleHeight="71.06" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
