<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 22:00:00.000"
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="2 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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) 22:00:00</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">
FF202604602152200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.531" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.754" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" Name="h`F2" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="522.263" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.406" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="438.257" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="375.101" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.910" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="94.290" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.297" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.432" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="104.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="100">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 370.000 370.000 372.000 374.000 376.000 378.000 380.000 385.000 380.000 375.000 380.000 385.000 380.000 390.000 425.000 425.000 420.000 425.000 430.000 430.000 430.000 435.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 440.000 440.000 445.000 445.000 445.000 435.000 425.000 415.000 430.000 422.500 415.000 420.000 420.000 420.000 420.000 422.500 425.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 460.000 460.000 460.000 462.500 465.000 470.000 467.500 465.000 466.250 467.500 468.750 480.000 480.000 490.000 490.000 491.250 492.500 493.750 495.000 495.000 495.000 500.000 500.000 505.000 507.476 510.329 513.651 517.570 522.263 527.982 535.106 544.225 556.315 573.108 598.014
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 66 0 0 72 0 72 75 0 63 0 66 63 63 54 54 54 69 60 60 60 60 54 54 51 66 60 63 54 54 57 60 57 57 0 0 63 60 57 66 63 63 63 63 0 57 69 69 63 66 54 0 72 57 63 0 69 72 75 72 75 78 78 0 72 75 78 0 75 66 54 75 0 60 0 66 66 54 54 0 0 0 69 66 72 72 78 75 78 75 63 48 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 1.171875 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.171875 -2.734375 -0.390625 -1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.587 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.229 140.0 145.0 150.0 155.0 160.0 165.0 168.458 170.0 175.0 180.0 185.0 190.0 195.0 197.687 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 438.257 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.268 0.352 0.393 0.406 0.401 0.388 0.363 0.326 0.271 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.246 0.281 0.317 0.352 0.387 0.406 0.43 0.489 0.559 0.638 0.726 0.821 0.921 1.026 1.136 1.249 1.365 1.486 1.609 1.737 1.868 2.004 2.143 2.287 2.436 2.589 2.746 2.909 3.077 3.251 3.43 3.614 3.805 4.002 4.204 4.413 4.629 4.85 5.078 5.311 5.55 5.793 6.041 6.291 6.542 6.792 7.037 7.274 7.498 7.703 7.882 8.027 8.131 8.189 8.2 8.199 8.184 8.153 8.108 8.048 7.976 7.892 7.799 7.696 7.584 7.466 7.342 7.212 7.077 6.939 6.798 6.654 6.509 6.363 6.215 6.068 5.92 5.773 5.627 5.482 5.339 5.197 5.057 4.919 4.783 4.649 4.518 4.389 4.263 4.14 4.019 3.901 3.785 3.673 3.563 3.455 3.351 3.249 3.15 3.054 2.96 2.868 2.78 2.693 2.609 2.528 2.449 2.372 2.298 2.225 2.155 2.087 2.021 1.957 1.895 1.834 1.776 1.719 1.665 1.611 1.56 1.51 1.462 1.415 1.37 1.326 1.283 1.242 1.202 1.163 1.126 1.09 1.054 1.021 0.988 0.956 0.925 0.895 0.866 0.838 0.811 0.785 0.76 0.735 0.711 0.688 0.666 0.645 0.624 0.604 0.584 0.565 0.547 0.529 0.512 0.495 0.479 0.464 0.449 0.434 0.42 0.407 0.394 0.381 0.368 0.357 0.345 0.334

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.406" PeakHeight="110.0" Num="3" Error="0.0">
-20.373 3.189 -0.229
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.406" EndFrequency="8.2" PeakHeight="438.257" Num="5" zHalfNm="375.101" Error="2.991">
-218.36 -38.666 21.199 -4.014 -0.729
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.687" Depth="0.206"/>
<TopsideChapman PeakHeight="438.257" PeakDensity="834243.2" PeakScaleHeight="47.432" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
