<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 20:40:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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) 20:40:00</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">
FF202604702162040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.603" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.717" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.650" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.800" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.860" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" 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="24" Val="118.250" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" 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="9.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="1.808" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="368.555" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.343" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.323" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.350" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="129.720" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.823" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.464" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.870" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.750" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="159">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.45 10.5 10.55 10.6 10.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 266.667 268.333 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.556 276.111 276.667 277.222 277.778 278.333 278.889 279.444 280.000 285.000 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 292.500 295.000 295.000 295.000 296.250 297.500 298.750 300.000 301.250 302.500 303.750 305.000 305.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 322.500 325.000 327.500 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 351.250 352.500 353.750 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 445.000 445.000 450.000 455.000 457.500 460.000 465.000 470.000 470.000 475.000 480.000 485.000 495.000 500.000 505.000 515.000 520.000 525.000 535.000 544.719 555.919 568.967 584.361 602.796
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 72 72 72 63 69 66 66 0 69 72 0 0 69 69 72 72 72 72 69 69 66 69 57 0 66 0 0 0 0 0 0 0 0 69 0 69 0 0 0 0 69 0 69 0 66 66 60 0 69 69 66 0 0 0 0 0 0 0 69 69 66 69 69 69 69 66 69 0 63 66 0 69 0 66 48 60 0 69 69 63 66 72 72 66 69 69 63 66 57 0 0 0 60 66 72 66 69 72 66 72 60 66 72 63 69 69 69 69 66 69 63 66 69 66 66 60 66 57 66 69 63 69 60 66 66 66 69 66 66 66 66 63 66 63 57 63 0 60 0 60 60 60 60 60 60 57 57 57 54 51 51 51 48 48 45 48 45 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 1.171875 -1.953125 -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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -1.953125 2.734375 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.8 1.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
118.250 120.009
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="27">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 113.750 112.500 111.250 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 116.250 117.500 118.750 120.000 121.250 122.500 123.750 125.000 125.000 125.000 125.000 130.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 0 60 75 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 57 51 0 51 57
</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 -2.734375 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 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" >
89.802 90.0 95.0 100.0 105.0 110.0 115.0 119.301 120.0 125.0 128.603 130.0 135.0 137.904 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.555 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.217 1.246 1.611 1.8 1.86 1.82 1.719 1.719 1.719 1.719 1.74 1.816 1.86 1.915 2.034 2.147 2.259 2.372 2.488 2.609 2.737 2.873 3.019 3.177 3.349 3.537 3.743 3.969 4.214 4.478 4.756 5.045 5.339 5.632 5.922 6.206 6.483 6.752 7.013 7.267 7.514 7.754 7.989 8.217 8.44 8.657 8.87 9.076 9.277 9.472 9.659 9.838 10.007 10.164 10.306 10.428 10.528 10.6 10.641 10.65 10.65 10.641 10.621 10.591 10.552 10.503 10.446 10.381 10.309 10.229 10.143 10.051 9.954 9.851 9.744 9.633 9.518 9.4 9.278 9.154 9.028 8.899 8.769 8.638 8.505 8.372 8.238 8.103 7.969 7.834 7.699 7.565 7.431 7.298 7.165 7.034 6.903 6.774 6.645 6.518 6.392 6.268 6.145 6.023 5.903 5.785 5.668 5.553 5.44 5.328 5.218 5.11 5.004 4.899 4.796 4.695 4.595 4.498 4.402 4.307 4.215 4.124 4.035 3.948 3.862 3.778 3.695 3.615 3.535 3.458 3.382 3.307 3.234 3.163 3.092 3.024 2.957 2.891 2.827 2.763 2.702 2.641 2.582 2.524 2.468 2.412 2.358 2.305 2.253 2.202 2.153 2.104 2.057 2.01 1.965 1.92 1.877 1.835 1.793 1.752 1.713 1.674 1.636 1.599 1.562 1.527 1.492 1.458 1.425 1.393 1.361 1.33 1.3 1.27 1.241 1.213 1.185 1.158 1.132 1.106 1.081 1.056 1.032 1.009 0.985 0.963 0.941

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.86" PeakHeight="110.0" Num="3" Error="0.0">
-28.839 10.812 -2.171
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.86" EndFrequency="10.65" PeakHeight="368.555" Num="5" zHalfNm="275.343" Error="5.564">
-208.983 -24.025 6.719 -9.27 4.908
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.904" Depth="0.141"/>
<TopsideChapman PeakHeight="368.555" PeakDensity="1407227.0" PeakScaleHeight="67.464" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
