<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 21:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.17 (076) 21:00:00</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">
FF202607603172100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.715" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.323" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="1.272" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="359.045" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="291.805" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.453" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="96.391" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.928" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.738" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.580" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" 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" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 280.000 275.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 280.000 277.500 275.000 270.000 270.000 275.000 275.000 275.000 275.000 280.000 280.833 281.667 282.500 283.333 284.167 285.000 282.500 280.000 280.000 282.500 285.000 286.250 287.500 288.750 290.000 291.250 292.500 293.750 295.000 296.250 297.500 298.750 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 306.667 308.333 310.000 312.500 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 325.000 325.000 330.000 332.500 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 367.500 370.000 370.000 370.000 372.500 375.000 375.000 377.500 380.000 380.000 380.000 382.500 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 450.000 460.000 470.000 470.000 470.000 470.000 470.000 472.500 475.000 480.000 485.000 493.363 506.527 530.293
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 63 0 66 0 66 0 63 0 0 69 60 60 72 72 72 69 0 0 0 0 0 0 0 0 57 54 0 72 0 0 0 0 0 0 0 0 0 0 0 57 60 63 0 0 66 60 0 48 69 0 0 63 0 54 60 63 0 69 57 63 69 72 72 0 66 0 69 0 69 66 0 63 66 0 72 63 45 72 69 0 69 72 72 0 69 72 60 66 0 72 69 66 69 72 66 69 0 63 69 69 0 66 69 0 63 69 72 63 69 72 60 66 69 72 63 69 72 63 69 72 72 69 72 72 66 54 63 69 69 66 66 66 66 66 66 66 63 66 63 66 63 66 63 57 63 57 0 60 54 57 57 0 51 0 42 45 48 45 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 -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 1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -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 -1.171875 -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 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.055 95.0 100.0 105.0 110.0 115.0 120.0 123.141 125.0 130.0 135.0 136.283 140.0 145.0 149.424 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 359.045 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.849 1.102 1.231 1.272 1.25 1.181 1.111 1.111 1.111 1.111 1.111 1.157 1.218 1.272 1.288 1.418 1.54 1.662 1.787 1.918 2.057 2.205 2.365 2.536 2.722 2.922 3.137 3.366 3.609 3.864 4.129 4.402 4.681 4.963 5.248 5.534 5.82 6.107 6.393 6.679 6.964 7.249 7.534 7.819 8.103 8.387 8.67 8.952 9.232 9.509 9.779 10.039 10.281 10.495 10.665 10.772 10.8 10.8 10.785 10.749 10.695 10.623 10.535 10.432 10.316 10.188 10.05 9.902 9.745 9.582 9.413 9.238 9.059 8.877 8.692 8.505 8.316 8.127 7.938 7.749 7.561 7.374 7.189 7.005 6.823 6.644 6.467 6.293 6.122 5.954 5.789 5.627 5.468 5.313 5.161 5.013 4.868 4.726 4.588 4.453 4.321 4.193 4.068 3.947 3.828 3.713 3.601 3.492 3.386 3.283 3.183 3.086 2.991 2.899 2.81 2.724 2.64 2.558 2.479 2.402 2.328 2.256 2.186 2.118 2.052 1.988 1.926 1.866 1.808 1.751 1.696 1.643 1.592 1.542 1.494 1.447 1.402 1.358 1.315 1.274 1.234 1.195 1.158 1.121 1.086 1.052 1.019 0.987 0.956 0.926 0.896 0.868 0.841 0.814 0.789 0.764 0.74 0.717 0.694 0.672 0.651 0.63 0.611 0.591 0.573 0.555 0.537 0.52 0.504 0.488 0.473 0.458 0.443 0.429 0.416 0.403 0.39 0.378 0.366 0.354 0.343 0.332 0.322 0.312 0.302 0.292

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.272" PeakHeight="110.0" Num="3" Error="0.0">
-27.513 9.141 -1.573
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.272" EndFrequency="10.8" PeakHeight="359.045" Num="5" zHalfNm="291.805" Error="3.756">
-181.718 -38.7 15.704 -8.418 3.511
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="39.424" Depth="0.161"/>
<TopsideChapman PeakHeight="359.045" PeakDensity="1447146.4" PeakScaleHeight="48.738" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
