<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 17:40:00.000"
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 0 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) 17:40:00</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">
FF202604702161740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.552" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.560" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.800" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="110.090" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.633" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="9.418" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="507.196" 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="3.151" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.248" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="360.440" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="260.300" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.367" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="130.927" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.308" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.636" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="171.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.210" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="129">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.7 10.75 10.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 235.000 250.000 255.000 260.000 265.000 265.000 270.000 277.500 285.000 285.000 290.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 302.500 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 326.667 328.333 330.000 332.500 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 380.000 380.000 385.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 450.000 450.000 450.000 455.000 455.000 457.500 460.000 465.000 465.000 467.500 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 497.597 500.464 503.646 507.196 511.184 515.694 520.838 526.759 533.646 541.758 551.454 563.247 577.899 596.597
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 57 63 57 57 51 45 54 51 0 54 60 60 60 54 57 57 54 57 54 0 57 0 57 60 60 60 54 57 60 60 60 57 0 0 57 0 54 60 60 0 45 57 54 45 57 54 45 57 57 60 63 57 63 63 60 60 63 63 0 66 63 60 66 63 63 66 60 66 66 63 66 57 63 66 66 66 66 63 48 57 63 54 60 51 60 63 57 63 57 60 54 60 63 63 51 60 63 57 60 51 60 51 57 45 57 63 57 63 54 57 57 57 57 54 51 54 54 54 51 48 48 48 48 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -1.171875 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.090 110.710 111.388 112.138 112.977
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -2.734375 -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" >
90.0 95.0 99.633 100.0 102.186 104.738 105.0 107.291 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 360.44 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.619 3.01 3.008 2.893 2.893 2.905 3.01 3.083 3.213 3.342 3.47 3.598 3.727 3.857 3.989 4.123 4.259 4.398 4.539 4.682 4.828 4.976 5.127 5.281 5.437 5.595 5.755 5.917 6.081 6.247 6.414 6.584 6.754 6.926 7.099 7.274 7.449 7.626 7.804 7.982 8.162 8.342 8.523 8.705 8.887 9.07 9.253 9.435 9.616 9.796 9.973 10.144 10.308 10.46 10.593 10.7 10.772 10.8 10.8 10.796 10.782 10.759 10.728 10.688 10.64 10.585 10.523 10.455 10.38 10.3 10.214 10.124 10.029 9.93 9.827 9.72 9.611 9.498 9.383 9.266 9.147 9.026 8.903 8.78 8.655 8.53 8.404 8.277 8.15 8.023 7.896 7.77 7.643 7.517 7.392 7.267 7.143 7.02 6.898 6.777 6.656 6.537 6.42 6.303 6.188 6.074 5.961 5.85 5.74 5.632 5.525 5.42 5.316 5.213 5.113 5.013 4.915 4.819 4.725 4.631 4.54 4.45 4.361 4.274 4.189 4.104 4.022 3.941 3.861 3.783 3.706 3.631 3.557 3.484 3.413 3.343 3.274 3.207 3.141 3.076 3.012 2.95 2.889 2.829 2.771 2.713 2.657 2.601 2.547 2.494 2.442 2.391 2.341 2.292 2.244 2.197 2.151 2.106 2.062 2.018 1.976 1.934 1.894 1.854 1.815 1.777 1.739 1.702 1.667 1.631 1.597 1.563 1.53 1.498 1.466 1.435 1.405 1.375 1.346 1.318 1.29 1.262 1.236 1.209 1.184 1.159 1.134

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.01" PeakHeight="99.633" Num="3" Error="4.129">
-14.223 5.987 -1.397
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.01" EndFrequency="10.8" PeakHeight="360.44" Num="5" zHalfNm="260.3" Error="3.272">
-205.674 -62.401 17.877 -4.341 1.39
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.658" Depth="0.117"/>
<TopsideChapman PeakHeight="360.44" PeakDensity="1447146.4" PeakScaleHeight="72.636" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
