<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 20:20:00.000"
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 33 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.02.15 (046) 20:20:00</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">
FF202604602152020009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.667" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.399" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.000" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.160" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="116.576" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="102.918" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="12.738" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.893" 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="2.094" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="350.622" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.122" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.403" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.869" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.190" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.443" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="126.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
240.000 245.000 250.000 255.000 250.000 250.833 251.667 252.500 253.333 254.167 255.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 267.500 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 273.333 276.667 280.000 280.000 280.000 280.000 280.833 281.667 282.500 283.333 284.167 285.000 285.000 285.000 290.000 295.000 292.500 290.000 290.000 292.500 295.000 296.250 297.500 298.750 300.000 305.000 305.000 305.833 306.667 307.500 308.333 309.167 310.000 310.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 325.000 325.000 325.000 327.500 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 452.500 455.000 457.500 460.000 463.333 466.667 470.000 470.000 470.000 475.000 475.000 475.000 480.000 482.500 485.893 489.828 494.447 499.945 506.600 514.819 525.228
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 51 45 0 0 0 0 0 63 54 0 0 66 66 66 63 60 0 63 0 57 57 57 60 66 63 69 54 0 0 66 66 69 69 0 0 0 0 0 66 63 63 0 0 0 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 63 66 54 0 63 69 0 60 66 69 60 0 69 57 63 66 57 0 69 69 60 66 69 60 66 72 0 66 69 66 72 66 72 63 69 72 66 72 63 72 69 72 63 72 75 72 60 66 69 63 69 63 69 60 66 63 69 69 66 69 66 66 69 69 57 66 69 66 69 60 63 69 60 63 0 63 0 66 0 0 51 60 60 57 60 0 54 0 54 54 57 54 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 2.734375 -0.390625 -2.734375 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 2.734375 -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 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
116.576 117.730 119.111 120.845
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 95.0 100.0 102.918 105.0 110.0 110.616 115.0 118.313 120.0 125.0 126.011 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 350.622 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.698 2.102 2.16 2.15 2.046 2.025 2.025 2.025 2.055 2.142 2.16 2.249 2.355 2.458 2.561 2.667 2.775 2.889 3.009 3.136 3.272 3.418 3.577 3.75 3.939 4.145 4.368 4.607 4.859 5.119 5.384 5.649 5.91 6.166 6.415 6.658 6.894 7.124 7.349 7.569 7.785 7.997 8.207 8.414 8.62 8.824 9.028 9.231 9.435 9.639 9.842 10.045 10.243 10.428 10.578 10.649 10.65 10.644 10.622 10.586 10.536 10.474 10.399 10.314 10.219 10.115 10.002 9.882 9.755 9.622 9.483 9.34 9.193 9.043 8.889 8.734 8.576 8.417 8.257 8.096 7.935 7.774 7.613 7.453 7.294 7.136 6.979 6.823 6.669 6.517 6.367 6.219 6.073 5.929 5.787 5.648 5.511 5.376 5.244 5.115 4.987 4.863 4.741 4.621 4.504 4.389 4.277 4.167 4.06 3.955 3.853 3.753 3.655 3.56 3.466 3.375 3.287 3.2 3.116 3.033 2.953 2.874 2.798 2.724 2.651 2.58 2.511 2.444 2.379 2.315 2.253 2.192 2.133 2.076 2.02 1.965 1.912 1.861 1.811 1.762 1.714 1.668 1.623 1.579 1.536 1.494 1.454 1.414 1.376 1.339 1.302 1.267 1.232 1.199 1.166 1.135 1.104 1.074 1.045 1.016 0.988 0.962 0.935 0.91 0.885 0.861 0.838 0.815 0.793 0.771 0.75 0.73 0.71 0.69 0.671 0.653 0.635 0.618 0.601 0.585 0.569 0.553 0.538 0.524 0.509 0.495 0.482

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.16" PeakHeight="102.918" Num="3" Error="5.626">
-18.66 7.28 -1.538
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.16" EndFrequency="10.65" PeakHeight="350.622" Num="5" zHalfNm="269.122" Error="3.758">
-179.69 -55.43 19.839 -15.339 6.009
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.093" Depth="0.135"/>
<TopsideChapman PeakHeight="350.622" PeakDensity="1407227.0" PeakScaleHeight="56.443" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
