<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 19:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.27 (086) 19:10:00</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">
FF202608603271910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.569" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.244" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.850" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="2.656" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="381.779" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.080" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.642" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.469" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.862" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.537" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="152.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.530" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="185">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 220.000 222.000 224.000 226.000 228.000 230.000 230.000 230.000 232.500 235.000 240.000 242.143 244.286 246.429 248.571 250.714 252.857 255.000 260.000 260.000 260.000 260.000 270.000 270.000 272.500 275.000 275.000 275.000 280.000 280.000 285.000 287.500 290.000 292.500 295.000 295.000 295.000 295.000 295.000 300.000 302.000 304.000 306.000 308.000 310.000 310.000 310.000 310.000 315.000 315.000 317.500 320.000 322.500 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 340.000 341.000 342.000 343.000 344.000 345.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 362.500 365.000 367.500 370.000 370.000 370.000 375.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 395.000 396.250 397.500 398.750 400.000 400.000 400.000 400.000 402.500 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 417.143 419.286 421.429 423.571 425.714 427.857 430.000 430.000 427.500 425.000 430.000 435.000 437.000 439.000 441.000 443.000 445.000 440.000 445.000 450.000 455.000 457.500 460.000 460.000 460.000 465.000 470.000 470.000 465.000 465.000 480.000 480.000 485.000 490.000 490.000 493.333 496.667 500.000 505.000 510.000 515.000 522.500 530.000 535.000 542.500 550.000 559.791 571.061 584.171 599.612 618.067 640.513
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 54 0 0 0 0 54 51 48 0 48 48 0 0 45 0 54 0 60 57 60 60 54 48 54 45 54 60 60 60 63 60 0 0 0 51 60 63 0 60 63 0 0 48 0 63 0 69 66 66 66 0 0 0 0 0 0 0 0 0 0 0 63 60 60 63 66 63 0 66 66 66 63 0 0 0 0 57 66 63 60 63 66 66 63 66 66 0 0 0 54 60 63 51 57 60 66 57 60 63 63 60 63 66 63 66 66 72 0 69 72 0 0 48 69 69 66 63 0 72 72 66 0 69 69 0 66 66 0 66 66 60 0 0 0 0 0 0 54 60 0 60 0 60 0 51 0 0 54 57 0 54 48 0 45 54 54 54 45 54 51 45 51 54 54 54 54 0 0 54 0 0 54 0 54 51 0 48 48 48 45 45 48 45
</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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 -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 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
</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" >
89.608 90.0 95.0 100.0 105.0 110.0 114.815 115.0 119.63 120.0 124.445 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 381.779 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.784 2.299 2.57 2.656 2.533 2.533 2.533 2.542 2.656 2.67 2.795 2.922 3.053 3.187 3.326 3.468 3.614 3.765 3.92 4.08 4.245 4.415 4.59 4.77 4.956 5.146 5.342 5.543 5.749 5.96 6.176 6.397 6.622 6.852 7.086 7.324 7.566 7.811 8.059 8.31 8.564 8.819 9.076 9.333 9.591 9.848 10.104 10.357 10.606 10.851 11.088 11.317 11.535 11.74 11.928 12.097 12.244 12.365 12.457 12.519 12.548 12.55 12.548 12.534 12.51 12.475 12.43 12.375 12.312 12.24 12.16 12.073 11.979 11.879 11.772 11.661 11.544 11.422 11.297 11.168 11.035 10.899 10.761 10.62 10.477 10.333 10.186 10.039 9.891 9.742 9.593 9.443 9.293 9.144 8.994 8.845 8.697 8.549 8.402 8.256 8.111 7.967 7.825 7.683 7.543 7.405 7.268 7.133 6.999 6.867 6.736 6.608 6.481 6.356 6.232 6.111 5.991 5.873 5.757 5.643 5.53 5.42 5.311 5.204 5.099 4.996 4.894 4.795 4.697 4.601 4.506 4.414 4.323 4.233 4.146 4.06 3.976 3.893 3.812 3.732 3.654 3.578 3.503 3.429 3.357 3.287 3.217 3.149 3.083 3.018 2.954 2.891 2.83 2.77 2.711 2.654 2.597 2.542 2.488 2.435 2.383 2.332 2.283 2.234 2.186 2.139 2.094 2.049 2.005 1.962 1.92 1.879 1.839 1.799 1.761 1.723 1.686 1.65 1.614 1.58 1.546 1.513 1.48 1.448 1.417 1.387

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.656" PeakHeight="110.0" Num="3" Error="0.0">
-29.877 12.243 -2.758
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.656" EndFrequency="12.55" PeakHeight="381.779" Num="5" zHalfNm="286.08" Error="4.126">
-221.269 -42.232 7.215 -1.562 0.514
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.445" Depth="0.123"/>
<TopsideChapman PeakHeight="381.779" PeakDensity="1954125.2" PeakScaleHeight="71.537" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
