<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 21:30:00.000"
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" >
2026.03.19 (078) 21:30:00</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">
FF202607803192130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.771" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.616" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="461.455" 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="0.648" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="363.980" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="310.818" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.171" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="78.328" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="25.657" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.088" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.650" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="171">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 280.000 281.667 283.333 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.714 286.429 287.143 287.857 288.571 289.286 290.000 290.000 290.000 290.000 290.000 290.000 291.071 292.143 293.214 294.286 295.357 296.429 297.500 298.571 299.643 300.714 301.786 302.857 303.929 305.000 305.000 310.000 310.000 310.000 310.000 310.000 305.000 305.000 306.667 308.333 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 322.500 325.000 320.000 320.000 320.000 320.000 320.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 342.500 345.000 345.000 345.000 340.000 341.250 342.500 343.750 345.000 347.500 350.000 352.500 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 367.500 370.000 367.500 365.000 367.500 370.000 372.500 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 387.500 390.000 390.000 390.000 395.000 392.500 390.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 411.000 412.000 413.000 414.000 415.000 417.500 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 457.977 461.455 465.571 470.519 476.578 484.171 493.965
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 51 0 0 63 63 63 57 0 48 0 60 0 57 0 0 66 0 66 66 0 0 72 54 0 0 0 0 0 0 0 0 0 0 0 0 0 72 72 60 0 0 0 63 69 57 0 0 66 72 0 0 72 60 0 63 66 51 54 0 0 0 0 51 66 0 54 54 0 69 54 0 0 0 66 72 0 75 0 75 0 63 0 69 78 0 78 0 66 0 72 0 63 66 69 75 72 75 63 66 0 72 0 75 69 75 54 63 0 75 0 75 0 66 66 69 54 0 66 69 57 0 69 72 0 63 66 66 54 60 69 66 54 60 63 66 69 60 63 51 54 0 0 0 0 63 54 60 48 57 60 63 57 57 57 54 45 54 57 54 57 54 54 48 0 51 51 48 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 1.171875 0.390625 -0.390625 -2.734375 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 1.953125 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -2.734375 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="172">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.925 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.811 140.0 145.0 150.0 155.0 160.0 161.622 165.0 170.0 175.0 180.0 185.0 187.433 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.98 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.43 0.561 0.627 0.648 0.639 0.61 0.559 0.479 0.347 0.316 0.316 0.316 0.316 0.316 0.316 0.316 0.359 0.424 0.488 0.552 0.617 0.648 0.732 0.865 0.992 1.124 1.268 1.428 1.606 1.807 2.033 2.286 2.566 2.871 3.197 3.541 3.898 4.265 4.639 5.019 5.402 5.788 6.176 6.567 6.959 7.354 7.749 8.144 8.539 8.93 9.316 9.691 10.048 10.376 10.66 10.881 11.016 11.05 11.049 11.025 10.969 10.885 10.774 10.64 10.485 10.313 10.125 9.924 9.712 9.492 9.264 9.031 8.794 8.554 8.313 8.072 7.831 7.592 7.355 7.121 6.89 6.664 6.441 6.223 6.01 5.802 5.599 5.401 5.209 5.022 4.841 4.664 4.494 4.329 4.168 4.014 3.864 3.719 3.58 3.445 3.314 3.189 3.067 2.951 2.838 2.729 2.625 2.524 2.427 2.333 2.243 2.157 2.073 1.993 1.916 1.842 1.77 1.701 1.635 1.572 1.51 1.452 1.395 1.341 1.289 1.238 1.19 1.144 1.099 1.056 1.015 0.975 0.937 0.9 0.865 0.831 0.799 0.768 0.738 0.709 0.681 0.654 0.629 0.604 0.58 0.558 0.536 0.515 0.495 0.475 0.457 0.439 0.422 0.405 0.389 0.374 0.359 0.345 0.332 0.319 0.306 0.294 0.283 0.272 0.261 0.251 0.241 0.232 0.222 0.214 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.648" PeakHeight="110.0" Num="3" Error="0.0">
-24.179 5.771 -0.667
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.648" EndFrequency="11.05" PeakHeight="363.98" Num="5" zHalfNm="310.818" Error="3.13">
-163.723 -21.904 12.272 -6.473 3.281
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.433" Depth="0.332"/>
<TopsideChapman PeakHeight="363.98" PeakDensity="1514919.4" PeakScaleHeight="39.088" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
