<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 20:10:00.000"
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: 75% PACIFIC flags: Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.03.21 (080) 20:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202608003212010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.738" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.313" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="11.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.734" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.116" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="353.895" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.721" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.686" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="92.273" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.834" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.295" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.240" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.210" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="179">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.55 11.6 11.65 11.7 11.75 11.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 265.000 265.000 266.000 267.000 268.000 269.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 285.000 287.500 290.000 292.500 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 300.000 301.250 302.500 303.750 305.000 310.000 310.000 313.333 316.667 320.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 332.500 335.000 330.000 332.500 335.000 337.500 340.000 342.500 345.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 352.500 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 382.500 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 411.667 413.333 415.000 415.000 420.000 420.000 422.500 425.000 425.000 425.000 425.000 425.000 430.000 432.500 435.000 437.500 440.000 435.000 437.500 440.000 442.500 445.000 445.000 445.000 447.500 450.000 451.667 453.333 455.000 460.000 462.500 465.000 460.000 461.667 463.333 464.710 466.343 468.312 470.734 473.783 477.741 483.084 490.694 502.402
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 0 63 60 60 0 0 66 66 54 57 0 0 0 0 0 0 60 0 60 57 54 51 51 66 66 63 0 66 0 0 60 54 0 63 60 0 66 0 0 0 66 66 66 63 63 66 66 0 63 66 0 0 0 0 54 0 0 0 51 54 0 0 48 54 0 0 63 54 0 60 66 0 57 69 0 69 0 63 0 54 60 66 66 72 0 66 69 69 0 69 54 0 66 69 57 63 69 72 60 66 72 60 66 0 57 60 66 69 0 63 66 69 60 63 69 69 63 66 72 57 69 69 66 72 66 45 66 69 66 66 69 69 0 0 66 66 63 66 0 57 60 63 0 60 63 45 57 0 45 60 0 57 0 54 0 57 0 54 0 0 57 51 0 48 54 0 0 51 57 57 57 0 48 57 51 0
</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 1.171875 -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 -1.953125 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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 1.171875 -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 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 -1.953125
</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" >
89.728 90.0 95.0 100.0 105.0 110.0 115.0 117.575 120.0 125.0 125.149 130.0 132.724 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 353.895 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.419 1.832 2.048 2.116 2.06 1.986 1.986 1.986 1.986 2.069 2.116 2.163 2.267 2.372 2.481 2.593 2.709 2.832 2.961 3.099 3.244 3.4 3.567 3.745 3.935 4.138 4.353 4.581 4.819 5.067 5.322 5.584 5.849 6.116 6.385 6.654 6.922 7.19 7.456 7.722 7.988 8.253 8.518 8.783 9.049 9.317 9.587 9.859 10.135 10.414 10.697 10.983 11.266 11.532 11.739 11.8 11.799 11.781 11.74 11.676 11.592 11.49 11.371 11.237 11.09 10.931 10.761 10.582 10.395 10.202 10.003 9.8 9.593 9.383 9.172 8.959 8.746 8.533 8.321 8.11 7.901 7.694 7.489 7.287 7.087 6.891 6.698 6.508 6.323 6.14 5.962 5.788 5.617 5.45 5.288 5.129 4.974 4.823 4.676 4.533 4.394 4.259 4.127 3.999 3.874 3.753 3.636 3.522 3.411 3.303 3.199 3.098 3.0 2.905 2.812 2.723 2.636 2.552 2.47 2.391 2.315 2.24 2.169 2.099 2.031 1.966 1.903 1.842 1.782 1.725 1.669 1.615 1.563 1.513 1.464 1.416 1.371 1.326 1.283 1.242 1.202 1.163 1.125 1.089 1.053 1.019 0.986 0.954 0.923 0.893 0.864 0.836 0.809 0.783 0.758 0.733 0.709 0.686 0.664 0.642 0.622 0.601 0.582 0.563 0.545 0.527 0.51 0.493 0.477 0.462 0.447 0.432 0.418 0.405 0.391 0.379 0.366 0.355 0.343 0.332 0.321 0.311 0.301 0.291 0.281 0.272

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.116" PeakHeight="110.0" Num="3" Error="0.0">
-29.238 11.347 -2.381
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.116" EndFrequency="11.8" PeakHeight="353.895" Num="5" zHalfNm="286.721" Error="2.823">
-168.35 -64.412 19.583 -11.663 3.671
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.724" Depth="0.13"/>
<TopsideChapman PeakHeight="353.895" PeakDensity="1727543.4" PeakScaleHeight="47.295" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
