<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-14 -073 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" >
2026.03.14 (073) 20:50:00</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">
FF202607303142050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.516" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.903" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.511" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="387.101" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="281.327" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.523" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="147.624" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.196" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.935" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="148">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 270.000 265.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 267.500 270.000 270.000 270.000 270.000 270.000 275.000 270.000 270.000 272.500 275.000 275.000 275.000 276.250 277.500 278.750 280.000 285.000 285.000 285.000 286.429 287.857 289.286 290.714 292.143 293.571 295.000 295.000 300.000 301.667 303.333 305.000 305.000 305.000 306.250 307.500 308.750 310.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 320.000 325.000 320.000 322.500 325.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 337.500 340.000 342.000 344.000 346.000 348.000 350.000 350.000 350.000 355.000 360.000 360.000 360.000 365.000 365.000 367.500 370.000 375.000 375.000 380.000 380.000 380.000 383.000 386.000 389.000 392.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 450.000 450.000 460.000 465.000 465.000 475.000 475.000 475.000 485.000 490.000 495.000 500.000 505.000 515.000 520.000 530.000 535.000 545.000 555.000 560.000 570.752 582.622 595.792 610.490 626.997 645.669
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 57 54 0 0 54 63 66 0 57 66 51 60 0 0 0 69 66 69 69 66 0 69 0 69 0 66 69 69 54 0 66 63 60 0 0 0 60 60 69 69 0 0 0 0 0 0 66 66 57 0 0 54 60 63 0 0 0 63 48 69 69 0 66 0 60 0 54 69 0 69 57 63 0 57 66 66 66 0 66 0 63 0 0 66 69 66 66 57 66 69 63 69 63 69 60 69 60 66 69 0 0 0 0 66 66 57 69 63 69 66 69 69 66 72 69 69 72 69 69 69 69 66 63 60 66 57 63 66 66 66 66 63 63 63 63 63 63 63 60 60 57 57 57 57 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 -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 -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 2.734375 -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 -0.390625 2.734375 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" >
89.932 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.197 125.0 130.0 132.393 135.0 140.0 143.59 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 387.101 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.206 1.01 1.309 1.462 1.511 1.483 1.395 1.365 1.365 1.365 1.365 1.399 1.464 1.511 1.541 1.64 1.731 1.821 1.912 2.005 2.103 2.208 2.32 2.442 2.577 2.727 2.897 3.09 3.311 3.561 3.839 4.135 4.437 4.734 5.019 5.291 5.548 5.792 6.025 6.247 6.459 6.664 6.862 7.054 7.24 7.42 7.596 7.767 7.934 8.096 8.254 8.408 8.556 8.699 8.835 8.964 9.083 9.192 9.289 9.37 9.433 9.477 9.498 9.5 9.499 9.49 9.474 9.451 9.421 9.385 9.342 9.293 9.24 9.18 9.117 9.048 8.975 8.899 8.819 8.735 8.649 8.559 8.467 8.373 8.277 8.179 8.079 7.978 7.875 7.771 7.667 7.562 7.456 7.349 7.243 7.136 7.029 6.923 6.816 6.71 6.604 6.498 6.393 6.289 6.185 6.082 5.98 5.879 5.779 5.679 5.581 5.483 5.387 5.292 5.197 5.104 5.012 4.922 4.832 4.744 4.657 4.571 4.486 4.403 4.321 4.24 4.16 4.082 4.004 3.928 3.854 3.78 3.708 3.637 3.567 3.498 3.43 3.364 3.298 3.234 3.171 3.109 3.049 2.989 2.93 2.873 2.816 2.761 2.706 2.653 2.6 2.549 2.498 2.449 2.4 2.352 2.305 2.259 2.214 2.17 2.127 2.084 2.043 2.002 1.962 1.922 1.884 1.846 1.809 1.772 1.737 1.702 1.668 1.634 1.601 1.569 1.537 1.506 1.476 1.446 1.417 1.388 1.36 1.333 1.306 1.279 1.253

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.511" PeakHeight="110.0" Num="3" Error="0.0">
-28.147 9.918 -1.839
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.511" EndFrequency="9.5" PeakHeight="387.101" Num="5" zHalfNm="281.327" Error="7.631">
-231.254 -11.459 5.942 -13.455 6.715
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="33.59" Depth="0.146"/>
<TopsideChapman PeakHeight="387.101" PeakDensity="1119727.0" PeakScaleHeight="75.935" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
