<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 20:50:00.000"
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) 20:50:00</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">
FF202606803092050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.581" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.686" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.544" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.166" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="306.401" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.522" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.519" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.004" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.336" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="125.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="176">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 260.000 260.000 262.500 265.000 267.500 270.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.714 286.429 287.143 287.857 288.571 289.286 290.000 290.000 292.143 294.286 296.429 298.571 300.714 302.857 305.000 300.000 300.000 305.000 306.250 307.500 308.750 310.000 310.000 315.000 315.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 327.500 330.000 330.000 335.000 335.000 335.000 335.000 340.000 342.000 344.000 346.000 348.000 350.000 352.500 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 367.500 370.000 370.000 370.000 372.000 374.000 376.000 378.000 380.000 380.000 385.000 385.000 387.500 390.000 390.000 390.000 390.000 395.000 400.000 400.000 401.667 403.333 405.000 406.667 408.333 410.000 410.000 413.333 416.667 420.000 420.000 422.500 425.000 425.000 427.500 430.000 430.000 430.000 430.000 430.000 430.000 435.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 455.000 455.000 457.500 460.000 462.500 465.000 470.000 471.667 473.333 475.000 470.000 470.000 477.500 485.000 485.000 490.000 491.429 492.857 494.286 495.714 497.143 498.571 500.000 500.000 502.500 505.000 510.000 512.500 515.000 517.500 520.000 524.670 530.175 536.759 544.774
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 54 57 57 48 0 0 51 51 54 60 63 0 0 57 60 0 63 63 63 63 60 0 60 60 0 57 57 0 0 0 63 0 0 66 63 0 0 48 0 0 0 48 63 63 60 0 51 0 60 63 54 57 60 63 66 66 66 0 69 66 69 69 0 72 72 69 72 0 72 72 0 0 72 0 69 0 63 69 51 78 72 75 78 69 51 60 69 75 0 0 72 0 72 75 66 72 0 69 78 78 81 60 69 75 60 66 0 75 0 69 75 0 0 54 63 0 54 63 0 54 60 69 72 72 72 69 54 60 66 69 60 63 66 0 66 66 0 69 63 66 69 63 0 63 0 63 51 0 0 54 0 0 0 48 54 42 0 0 0 0 0 0 54 0 0 51 51 45 51 0 51 45 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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.917 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.962 125.0 130.0 131.924 135.0 140.0 142.886 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.166 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.207 1.032 1.337 1.494 1.544 1.515 1.424 1.399 1.399 1.399 1.399 1.44 1.506 1.544 1.588 1.692 1.799 1.91 2.028 2.153 2.287 2.431 2.587 2.756 2.938 3.135 3.344 3.566 3.797 4.036 4.279 4.526 4.773 5.02 5.265 5.508 5.749 5.987 6.224 6.458 6.691 6.922 7.152 7.381 7.61 7.839 8.068 8.297 8.527 8.759 8.992 9.227 9.464 9.704 9.947 10.193 10.442 10.691 10.936 11.17 11.368 11.487 11.5 11.497 11.477 11.438 11.383 11.313 11.228 11.13 11.02 10.899 10.769 10.629 10.481 10.327 10.166 10.001 9.83 9.656 9.479 9.299 9.118 8.935 8.751 8.567 8.383 8.2 8.017 7.835 7.655 7.476 7.299 7.124 6.951 6.781 6.613 6.448 6.285 6.125 5.968 5.814 5.663 5.515 5.37 5.228 5.089 4.953 4.82 4.69 4.563 4.439 4.318 4.2 4.085 3.973 3.863 3.756 3.652 3.55 3.451 3.355 3.261 3.17 3.081 2.994 2.91 2.828 2.748 2.67 2.595 2.521 2.449 2.38 2.312 2.246 2.182 2.12 2.06 2.001 1.944 1.888 1.834 1.782 1.731 1.681 1.633 1.586 1.541 1.497 1.454 1.412 1.371 1.332 1.294 1.257 1.22 1.185 1.151 1.118 1.086 1.055 1.024 0.995 0.966 0.938 0.911 0.885 0.86 0.835 0.811 0.787 0.765 0.743 0.721 0.7 0.68 0.661 0.642 0.623 0.605 0.588 0.571 0.554 0.538 0.523 0.508

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.544" PeakHeight="110.0" Num="3" Error="0.0">
-28.223 10.013 -1.873
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.544" EndFrequency="11.5" PeakHeight="382.166" Num="5" zHalfNm="306.401" Error="4.256">
-198.736 -58.562 29.78 -16.116 4.354
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="32.886" Depth="0.145"/>
<TopsideChapman PeakHeight="382.166" PeakDensity="1640818.9" PeakScaleHeight="53.336" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
