<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 17:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.09 (068) 17:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606803091730009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.579" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.754" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.185" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.264" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="366.353" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.485" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.253" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="123.978" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.101" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.307" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="159">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 272.000 274.000 276.000 278.000 280.000 280.000 285.000 287.500 290.000 292.500 295.000 297.500 300.000 305.000 306.250 307.500 308.750 310.000 310.000 315.000 320.000 321.000 322.000 323.000 324.000 325.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 367.500 370.000 370.000 370.000 370.000 372.500 375.000 377.500 380.000 380.000 381.667 383.333 385.000 385.000 385.000 385.000 390.000 390.000 385.000 390.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 412.500 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 445.000 445.000 447.500 450.000 450.000 450.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 480.000 485.000 490.000 493.333 496.667 500.000 500.000 506.250 512.500 518.750 525.000 530.000 535.000 542.877 551.643 561.455 572.515 585.075 599.464
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 0 0 45 57 57 0 0 0 0 0 51 48 0 48 0 0 0 0 0 0 0 0 0 54 57 69 69 69 66 66 72 72 69 66 75 78 72 66 60 60 0 60 60 0 60 66 60 60 60 66 66 69 66 63 66 69 69 66 69 72 72 69 75 78 78 75 75 63 69 72 57 78 66 75 51 60 69 0 0 60 69 0 75 63 66 72 57 63 69 54 63 63 69 72 72 69 69 66 0 0 63 51 0 60 0 0 60 48 0 57 57 51 0 57 57 57 57 54 51 54 51 0 0 51 51 0 51 0 0 45 48 45 42 48 48 0 51 48 42 0 0 51 48 0 0 0 51 51 48 48 45 0 45 42 42
</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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.515 90.0 95.0 100.0 105.0 110.0 112.407 114.815 115.0 117.222 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.353 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.142 2.757 3.081 3.185 3.063 3.063 3.072 3.185 3.281 3.438 3.585 3.728 3.867 4.006 4.146 4.286 4.429 4.575 4.724 4.876 5.033 5.194 5.36 5.531 5.707 5.89 6.077 6.271 6.471 6.676 6.888 7.105 7.327 7.555 7.787 8.024 8.265 8.509 8.756 9.006 9.258 9.511 9.764 10.018 10.271 10.523 10.773 11.019 11.261 11.496 11.722 11.936 12.134 12.312 12.464 12.582 12.662 12.698 12.7 12.697 12.681 12.653 12.613 12.562 12.501 12.431 12.351 12.263 12.166 12.063 11.952 11.836 11.714 11.586 11.454 11.317 11.177 11.033 10.887 10.737 10.586 10.432 10.277 10.121 9.964 9.806 9.647 9.489 9.33 9.171 9.013 8.856 8.699 8.543 8.388 8.234 8.081 7.93 7.78 7.632 7.485 7.34 7.197 7.056 6.916 6.778 6.643 6.509 6.377 6.247 6.119 5.993 5.869 5.748 5.628 5.51 5.395 5.281 5.17 5.06 4.952 4.847 4.743 4.642 4.542 4.444 4.348 4.254 4.162 4.072 3.983 3.896 3.811 3.728 3.646 3.566 3.488 3.411 3.336 3.263 3.191 3.12 3.051 2.983 2.917 2.853 2.789 2.727 2.667 2.607 2.549 2.492 2.437 2.382 2.329 2.277 2.226 2.177 2.128 2.08 2.034 1.988 1.943 1.9 1.857 1.816 1.775 1.735 1.696 1.658 1.621 1.584 1.549 1.514 1.48 1.446 1.414 1.382 1.351 1.32 1.291 1.262 1.233 1.205 1.178 1.152

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.185" PeakHeight="110.0" Num="3" Error="0.0">
-30.346 12.923 -3.062
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.185" EndFrequency="12.7" PeakHeight="366.353" Num="5" zHalfNm="274.485" Error="4.713">
-203.928 -54.811 8.986 -1.418 2.04
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.222" Depth="0.122"/>
<TopsideChapman PeakHeight="366.353" PeakDensity="2001116.6" PeakScaleHeight="68.307" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
