<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-09 -040 22:40:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2, 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" >
2026.02.09 (040) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202604002092240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.397" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.176" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="410.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="410.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="602.057" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="470.011" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="403.213" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.615" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.877" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.314" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.356" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="112.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 413.333 416.667 420.000 420.000 420.000 420.000 422.500 425.000 427.500 430.000 430.000 430.000 432.500 435.000 440.000 440.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 450.000 455.000 455.000 452.500 450.000 455.000 460.000 465.000 467.500 470.000 470.000 475.000 475.000 475.000 475.000 480.000 482.500 485.000 485.000 490.000 490.000 495.000 495.000 495.000 495.000 495.000 490.000 490.000 495.000 500.000 500.000 500.000 502.632 505.263 507.895 510.526 513.158 515.789 518.421 521.053 523.684 526.316 528.947 531.579 534.211 536.842 539.474 542.105 544.737 547.368 550.000 550.000 555.000 575.000 580.000 585.000 590.000 592.500 595.000 592.500 593.157 594.233 596.315 602.057
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 54 60 57 60 0 57 0 54 54 63 0 63 51 0 54 60 60 69 60 66 0 60 63 0 54 57 0 66 57 57 54 0 48 60 54 57 57 66 63 60 63 63 66 66 60 63 69 69 69 69 69 69 63 69 66 63 66 72 75 72 60 72 72 60 69 66 0 66 0 0 0 0 0 69 69 69 69 66 57 63 60 60 0 57 57 57 54
</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 -1.953125 -0.390625 -0.390625 -0.390625 -1.953125 -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 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 -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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.394 145.0 150.0 155.0 160.0 165.0 170.0 174.788 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.182 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 470.011 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.225 0.249 0.272 0.296 0.32 0.344 0.354 0.386 0.446 0.508 0.576 0.648 0.726 0.81 0.9 0.995 1.096 1.203 1.313 1.429 1.548 1.671 1.798 1.928 2.061 2.197 2.336 2.477 2.622 2.769 2.919 3.072 3.227 3.385 3.546 3.711 3.878 4.048 4.221 4.397 4.577 4.76 4.947 5.137 5.331 5.528 5.729 5.933 6.14 6.35 6.562 6.775 6.986 7.195 7.396 7.583 7.749 7.882 7.969 8.0 8.0 7.992 7.969 7.933 7.883 7.821 7.749 7.667 7.575 7.476 7.37 7.258 7.14 7.017 6.891 6.761 6.629 6.494 6.358 6.22 6.082 5.944 5.806 5.668 5.531 5.394 5.259 5.126 4.994 4.863 4.735 4.608 4.484 4.362 4.242 4.125 4.009 3.897 3.786 3.679 3.573 3.47 3.37 3.272 3.176 3.083 2.992 2.904 2.818 2.734 2.653 2.573 2.496 2.421 2.348 2.277 2.208 2.141 2.076 2.013 1.952 1.892 1.835 1.779 1.724 1.671 1.62 1.57 1.522 1.475 1.43 1.386 1.343 1.302 1.261 1.222 1.185 1.148 1.113 1.078 1.045 1.012 0.981 0.951 0.921 0.893 0.865 0.838 0.812 0.787 0.762 0.739 0.716 0.693 0.672 0.651 0.631 0.611 0.592 0.574 0.556 0.539 0.522 0.506 0.49 0.475 0.46

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.0" PeakHeight="470.011" Num="5" zHalfNm="403.213" Error="3.082">
-237.712 -48.816 32.814 -11.582 2.467
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.182" Depth="0.154"/>
<TopsideChapman PeakHeight="470.011" PeakDensity="794044.7" PeakScaleHeight="49.356" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
