<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 19:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.03.24 (083) 19:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608303241930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.644" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.740" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="476.728" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.511" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="355.963" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.175" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.683" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="117.020" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.875" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.938" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="139.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="163">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 220.000 225.000 230.000 230.000 235.000 240.000 240.000 245.000 245.000 247.500 250.000 250.000 250.000 251.250 252.500 253.750 255.000 256.250 257.500 258.750 260.000 261.250 262.500 263.750 265.000 266.250 267.500 268.750 270.000 270.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 287.500 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 297.500 300.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 315.000 315.000 315.000 315.000 317.000 319.000 321.000 323.000 325.000 325.000 325.000 327.500 330.000 332.500 335.000 337.500 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 417.500 420.000 422.500 425.000 425.000 425.000 425.000 430.000 430.000 432.500 435.000 437.500 440.000 440.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 465.000 465.000 465.000 466.917 469.018 471.329 473.886 476.728 479.906 483.484 487.542 492.185 497.547 503.810 511.223 520.133 531.045 544.720 562.359
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 57 0 54 54 60 57 63 57 63 0 57 48 48 0 0 0 0 0 0 0 0 0 0 0 66 0 0 0 63 60 60 60 0 0 63 0 60 0 0 0 0 0 0 60 57 0 0 60 57 0 66 63 69 69 69 0 60 72 69 72 72 69 0 0 0 0 69 72 75 45 72 0 66 0 57 60 66 66 60 66 51 60 66 72 63 69 60 66 72 60 69 72 75 72 75 69 75 75 72 75 75 75 72 69 72 63 69 72 66 69 63 66 69 69 66 66 66 63 66 0 66 51 60 66 66 69 63 66 0 63 0 51 57 45 51 54 51 51 48 54 54 54 48 54 51 51 48 48 48 0 45 0 45 42 48 48 48 0 0 0 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 -0.390625 -0.390625 2.734375 -0.390625 -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 -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 -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 0.390625 0.390625 1.953125 -0.390625 -0.390625 0.390625 -0.390625 1.171875 2.734375 1.171875 -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" >
89.637 90.0 95.0 100.0 105.0 110.0 115.0 115.528 120.0 121.056 125.0 126.584 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.963 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.686 2.174 2.43 2.511 2.41 2.387 2.387 2.387 2.475 2.511 2.594 2.716 2.84 2.966 3.098 3.234 3.377 3.527 3.684 3.85 4.025 4.209 4.401 4.603 4.812 5.028 5.25 5.476 5.705 5.936 6.168 6.4 6.632 6.862 7.091 7.318 7.544 7.769 7.992 8.213 8.433 8.653 8.871 9.088 9.305 9.52 9.735 9.948 10.16 10.368 10.571 10.764 10.941 11.092 11.2 11.249 11.25 11.245 11.227 11.196 11.153 11.098 11.033 10.957 10.872 10.779 10.677 10.569 10.453 10.332 10.205 10.074 9.938 9.799 9.656 9.51 9.362 9.212 9.06 8.907 8.753 8.598 8.443 8.288 8.133 7.979 7.825 7.672 7.52 7.369 7.219 7.071 6.924 6.779 6.635 6.494 6.354 6.216 6.08 5.946 5.815 5.685 5.558 5.433 5.31 5.189 5.07 4.954 4.839 4.727 4.618 4.51 4.404 4.301 4.2 4.101 4.003 3.908 3.815 3.724 3.635 3.548 3.463 3.38 3.298 3.219 3.141 3.065 2.991 2.918 2.847 2.778 2.71 2.644 2.58 2.517 2.455 2.395 2.336 2.279 2.223 2.168 2.115 2.063 2.012 1.963 1.914 1.867 1.821 1.776 1.732 1.69 1.648 1.607 1.567 1.529 1.491 1.454 1.418 1.383 1.348 1.315 1.282 1.251 1.22 1.189 1.16 1.131 1.103 1.076 1.049 1.023 0.997 0.973 0.949 0.925 0.902 0.88 0.858 0.836 0.816 0.795 0.776 0.756 0.737 0.719

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.511" PeakHeight="110.0" Num="3" Error="0.0">
-29.727 12.028 -2.664
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.511" EndFrequency="11.25" PeakHeight="355.963" Num="5" zHalfNm="269.175" Error="2.291">
-189.387 -51.175 17.797 -9.434 2.82
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.584" Depth="0.124"/>
<TopsideChapman PeakHeight="355.963" PeakDensity="1570254.4" PeakScaleHeight="61.938" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
