<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 09:40:00.000"
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: 100%</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) 09:40:00</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">
FF202604602150940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.982" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.361" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.850" 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="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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.777" 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="312.618" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.582" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.550" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="117.209" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.826" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.791" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.770" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 257.500 255.000 255.000 253.750 252.500 251.250 250.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 252.500 255.000 250.000 250.000 250.000 255.000 256.250 257.500 258.750 260.000 261.250 262.500 263.750 265.000 265.000 265.000 265.000 267.500 270.000 272.500 275.000 275.000 275.000 275.000 275.000 276.667 278.333 280.000 285.000 285.000 285.000 285.000 285.000 285.000 288.750 292.500 296.250 300.000 300.000 300.000 300.000 302.500 305.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 360.000 365.000 365.000 370.000 374.453 379.580 385.550 392.587 401.006 411.258 424.014 440.322 461.902 491.806 536.000 607.943
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 51 54 0 0 0 51 63 0 60 0 63 63 66 66 66 69 63 63 66 66 0 63 0 0 66 63 66 57 0 0 0 0 0 0 0 66 0 75 72 0 60 48 54 0 66 66 69 0 0 69 57 63 69 72 72 0 0 0 0 57 57 60 0 0 69 72 72 72 72 69 72 66 72 66 72 63 66 63 69 66 72 72 72 75 72 69 66 72 72 72 72 75 72 69 69 66 69 69 63 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 -1.953125 0.390625 0.390625 -0.390625 0.390625 2.734375 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 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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 -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" >
89.83 90.0 95.0 100.0 105.0 110.0 115.0 119.488 120.0 125.0 128.977 130.0 135.0 138.465 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 312.618 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.189 1.539 1.72 1.777 1.739 1.639 1.639 1.639 1.639 1.654 1.727 1.777 1.811 1.92 2.031 2.144 2.262 2.387 2.52 2.664 2.82 2.991 3.18 3.388 3.619 3.874 4.149 4.441 4.741 5.039 5.327 5.599 5.853 6.086 6.299 6.492 6.666 6.822 6.96 7.082 7.187 7.276 7.351 7.41 7.454 7.483 7.498 7.5 7.499 7.49 7.474 7.449 7.417 7.377 7.332 7.28 7.222 7.16 7.092 7.02 6.945 6.865 6.782 6.696 6.608 6.517 6.424 6.33 6.234 6.137 6.038 5.939 5.839 5.739 5.639 5.539 5.438 5.338 5.239 5.139 5.041 4.943 4.846 4.749 4.654 4.56 4.466 4.374 4.283 4.193 4.104 4.017 3.931 3.846 3.763 3.681 3.6 3.521 3.443 3.367 3.291 3.218 3.145 3.074 3.005 2.936 2.869 2.804 2.739 2.676 2.615 2.554 2.495 2.437 2.381 2.325 2.271 2.218 2.166 2.115 2.065 2.017 1.969 1.923 1.877 1.833 1.79 1.747 1.706 1.665 1.626 1.587 1.549 1.512 1.476 1.441 1.407 1.373 1.34 1.308 1.277 1.246 1.216 1.187 1.159 1.131 1.104 1.077 1.051 1.026 1.002 0.977 0.954 0.931 0.909 0.887 0.865 0.845 0.824 0.804 0.785 0.766 0.748 0.73 0.712 0.695 0.678 0.662 0.646 0.63 0.615 0.6 0.586 0.571 0.558 0.544 0.531 0.518 0.506 0.493 0.482 0.47 0.459 0.447 0.437 0.426

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.777" PeakHeight="110.0" Num="3" Error="0.0">
-28.693 10.62 -2.097
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.777" EndFrequency="7.5" PeakHeight="312.618" Num="5" zHalfNm="229.582" Error="5.15">
-171.887 7.905 -12.58 1.463 0.946
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.465" Depth="0.138"/>
<TopsideChapman PeakHeight="312.618" PeakDensity="697890.8" PeakScaleHeight="63.791" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
