<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 21:40:00.000"
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="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 21:40:00</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">
FF202604702162140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.590" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.713" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.635" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.662" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="325.893" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.032" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.465" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.889" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.827" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.880" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="169">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 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 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 10.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 315.000 316.667 318.333 320.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 347.500 350.000 350.000 350.000 350.000 350.000 350.000 351.250 352.500 353.750 355.000 355.000 360.000 360.000 360.000 360.000 362.500 365.000 367.500 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 456.667 458.333 460.000 462.500 465.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 499.186 503.767 508.801 514.359 520.528 527.414 535.149 543.903 553.888 565.385
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 63 57 69 0 0 72 0 75 0 69 66 0 0 0 57 0 0 0 0 69 72 0 0 75 75 75 57 75 75 75 72 72 69 0 0 0 78 78 0 51 75 75 0 0 0 0 0 57 0 0 66 0 54 0 0 66 0 72 0 60 0 72 0 72 72 0 0 69 57 63 0 69 0 72 69 0 69 0 75 72 69 0 69 75 0 72 57 63 0 72 75 78 66 0 72 72 60 66 69 66 63 0 72 75 72 69 75 75 75 72 75 75 69 75 78 69 72 75 66 69 72 72 66 72 60 69 72 75 72 72 60 66 69 66 66 66 63 63 60 63 57 60 54 60 0 0 57 0 57 57 57 57 57 54 54 54 51 51 51 48 48 48 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
90.97 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.012 140.0 145.0 150.0 155.0 160.0 162.023 165.0 170.0 175.0 180.0 185.0 188.035 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.662 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.421 0.55 0.615 0.635 0.626 0.598 0.549 0.471 0.344 0.306 0.306 0.306 0.306 0.306 0.306 0.306 0.344 0.407 0.47 0.533 0.597 0.635 0.686 0.796 0.902 1.01 1.126 1.252 1.391 1.545 1.718 1.912 2.128 2.367 2.628 2.909 3.206 3.517 3.838 4.166 4.498 4.833 5.169 5.506 5.842 6.178 6.513 6.847 7.179 7.508 7.833 8.155 8.471 8.78 9.08 9.367 9.64 9.893 10.122 10.321 10.483 10.604 10.677 10.7 10.7 10.689 10.659 10.611 10.547 10.468 10.375 10.27 10.153 10.026 9.89 9.746 9.594 9.437 9.274 9.107 8.936 8.762 8.586 8.409 8.23 8.05 7.87 7.691 7.512 7.334 7.158 6.983 6.81 6.639 6.47 6.304 6.14 5.979 5.821 5.665 5.513 5.363 5.217 5.073 4.933 4.796 4.662 4.531 4.403 4.278 4.156 4.038 3.922 3.809 3.699 3.592 3.488 3.386 3.287 3.191 3.098 3.007 2.919 2.833 2.749 2.668 2.589 2.512 2.438 2.365 2.295 2.226 2.16 2.096 2.033 1.972 1.913 1.856 1.8 1.746 1.694 1.643 1.594 1.546 1.5 1.455 1.411 1.368 1.327 1.287 1.248 1.211 1.174 1.139 1.105 1.071 1.039 1.008 0.977 0.948 0.919 0.891 0.864 0.838 0.813 0.788 0.765 0.741 0.719 0.697 0.676 0.656 0.636 0.617 0.598 0.58 0.562 0.545 0.529 0.513 0.497 0.482 0.468 0.454 0.44 0.427

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.635" PeakHeight="110.0" Num="3" Error="0.0">
-24.049 5.665 -0.646
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.635" EndFrequency="10.7" PeakHeight="394.662" Num="5" zHalfNm="325.893" Error="4.064">
-200.106 -12.154 8.375 -6.094 3.352
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="78.035" Depth="0.329"/>
<TopsideChapman PeakHeight="394.662" PeakDensity="1420471.5" PeakScaleHeight="50.827" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
