<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 18:00:00.000"
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="1 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) 18:00:00</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">
FF202604602151800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.519" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.731" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.650" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.710" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="109.164" Name="h`E" 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="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.077" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.212" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="380.686" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.095" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.470" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.463" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.090" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.849" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="160.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.350" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="155">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 250.000 255.000 260.000 265.000 270.000 275.000 280.000 285.000 285.000 290.000 295.000 300.000 300.000 305.000 310.000 311.667 313.333 315.000 310.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 357.000 359.000 361.000 363.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 407.500 410.000 410.000 410.000 415.000 416.667 418.333 420.000 420.000 420.000 420.000 420.000 420.000 422.500 425.000 430.000 430.000 430.000 431.429 432.857 434.286 435.714 437.143 438.571 440.000 440.000 442.500 445.000 447.500 450.000 455.000 457.500 460.000 462.500 465.000 467.500 470.000 470.000 472.500 475.000 478.333 481.667 485.000 485.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 520.000 525.000 528.811 533.122 538.037 543.696 550.278 558.030 567.296 578.566 592.570 610.438 634.027
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 51 45 0 51 0 54 57 54 54 0 54 54 51 48 0 0 51 48 51 57 0 60 57 57 57 0 54 0 60 0 57 60 57 0 60 57 54 60 60 60 57 57 60 60 63 60 57 51 60 60 60 60 63 63 60 57 0 0 0 0 60 63 57 0 63 54 60 63 69 66 63 63 54 60 66 54 66 63 51 57 63 66 66 66 66 60 66 69 60 66 0 66 66 0 0 57 63 66 63 60 51 0 60 63 63 63 0 0 0 0 0 0 57 54 0 57 0 57 48 0 0 0 45 0 42 48 0 48 0 0 45 51 45 51 0 51 48 42 42 42 51 51 51 51 48 0 51 0 45 48 45 42 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 1.171875 -1.171875 0.390625 1.171875 0.390625 0.390625 2.734375 0.390625 -1.171875 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 -2.734375 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 2.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
109.164 110.512
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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" >
89.598 90.0 95.0 100.0 105.0 110.0 112.874 115.0 115.749 118.623 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.686 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.82 2.346 2.622 2.71 2.603 2.603 2.603 2.71 2.754 2.908 3.056 3.2 3.343 3.485 3.628 3.773 3.919 4.068 4.219 4.373 4.53 4.691 4.855 5.022 5.194 5.369 5.548 5.731 5.917 6.108 6.302 6.501 6.703 6.908 7.118 7.33 7.546 7.765 7.987 8.212 8.439 8.668 8.9 9.133 9.366 9.601 9.836 10.069 10.302 10.531 10.756 10.976 11.188 11.389 11.577 11.747 11.897 12.021 12.115 12.176 12.2 12.2 12.196 12.181 12.155 12.119 12.073 12.019 11.956 11.885 11.806 11.721 11.629 11.53 11.427 11.318 11.204 11.086 10.964 10.838 10.709 10.577 10.443 10.307 10.168 10.028 9.887 9.744 9.6 9.456 9.312 9.167 9.022 8.877 8.732 8.588 8.445 8.302 8.159 8.018 7.878 7.739 7.601 7.464 7.329 7.195 7.062 6.931 6.802 6.674 6.548 6.423 6.3 6.179 6.06 5.942 5.826 5.712 5.6 5.489 5.38 5.273 5.168 5.064 4.962 4.862 4.764 4.667 4.573 4.479 4.388 4.298 4.21 4.123 4.038 3.955 3.873 3.793 3.714 3.637 3.562 3.487 3.415 3.343 3.273 3.205 3.138 3.072 3.007 2.944 2.882 2.821 2.762 2.703 2.646 2.59 2.535 2.482 2.429 2.378 2.327 2.278 2.229 2.182 2.136 2.09 2.046 2.002 1.96 1.918 1.877 1.837 1.798 1.759 1.722 1.685 1.649 1.614 1.579 1.545 1.512 1.48 1.448 1.417 1.387 1.357

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.71" PeakHeight="110.0" Num="3" Error="0.0">
-29.931 12.32 -2.791
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.71" EndFrequency="12.2" PeakHeight="380.686" Num="5" zHalfNm="284.095" Error="3.722">
-222.264 -51.95 12.329 -1.194 1.016
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.623" Depth="0.107"/>
<TopsideChapman PeakHeight="380.686" PeakDensity="1846650.1" PeakScaleHeight="71.849" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
