<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 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 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" >
2026.03.30 (089) 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">
FF202608903301930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="14.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.543" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="35.860" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="14.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="12.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="2.490" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="393.187" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="296.452" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.684" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.295" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="77.628" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.987" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="147.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.760" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="208">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7 13.75 13.8 13.85 13.9 13.95 14.0 14.05 14.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 255.000 256.667 258.333 260.000 261.667 263.333 265.000 265.000 265.000 270.000 270.000 270.000 270.000 273.333 276.667 280.000 282.500 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 300.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 320.000 317.500 315.000 320.000 320.000 320.000 321.667 323.333 325.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 337.000 339.000 341.000 343.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 356.667 358.333 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 372.500 375.000 377.500 380.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 390.000 388.750 387.500 386.250 385.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 398.333 401.667 405.000 405.000 405.000 405.000 405.000 405.000 410.000 411.250 412.500 413.750 415.000 415.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 421.333 422.667 424.000 425.333 426.667 428.000 429.333 430.667 432.000 433.333 434.667 436.000 437.333 438.667 440.000 445.000 450.000 450.000 451.667 453.333 455.000 457.500 460.000 465.000 467.500 470.000 475.000 477.500 480.000 482.500 485.000 487.500 490.000 495.000 500.000 502.500 505.000 510.000 517.857 525.714 533.571 541.429 549.286 557.143 565.000 570.000 590.000 605.000 618.233 632.731 648.683 666.321
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 54 0 0 54 0 0 66 69 63 63 63 63 57 0 0 66 0 60 0 63 60 63 63 0 57 48 0 0 0 0 0 0 51 54 57 0 54 0 0 0 0 0 0 63 0 48 0 63 57 0 63 0 0 51 54 48 48 66 66 63 63 0 69 66 60 54 54 72 72 69 66 0 0 0 0 72 75 78 78 75 75 81 84 81 75 0 0 63 69 72 72 75 66 69 72 75 72 75 69 72 0 69 0 69 0 57 0 0 60 63 66 66 66 48 0 0 0 54 57 0 60 54 0 57 0 0 51 0 60 0 51 60 45 0 0 48 54 60 63 63 57 57 0 0 0 51 51 0 0 51 0 51 0 54 0 42 0 0 0 0 0 0 0 0 0 0 0 0 0 51 45 45 0 0 48 0 57 54 0 54 48 0 0 0 45 0 48 48 45 0 42 45 0 0 0 0 0 0 57 48 51 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 -1.953125 -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 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 2.734375 -1.953125 -1.171875 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 -1.171875 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 -0.390625 -2.734375 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 -2.734375 -1.171875
</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" >
89.642 90.0 95.0 100.0 105.0 110.0 115.0 115.632 120.0 121.263 125.0 126.895 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.187 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.672 2.156 2.409 2.49 2.392 2.365 2.365 2.365 2.448 2.49 2.58 2.721 2.859 2.997 3.136 3.277 3.421 3.568 3.719 3.875 4.037 4.204 4.377 4.558 4.746 4.941 5.145 5.357 5.579 5.809 6.049 6.298 6.556 6.824 7.1 7.385 7.678 7.978 8.285 8.597 8.913 9.233 9.554 9.877 10.198 10.518 10.835 11.147 11.453 11.75 12.039 12.315 12.579 12.828 13.061 13.274 13.467 13.638 13.784 13.904 13.996 14.06 14.094 14.1 14.099 14.088 14.065 14.03 13.985 13.929 13.863 13.787 13.703 13.611 13.511 13.404 13.29 13.17 13.045 12.914 12.778 12.638 12.494 12.347 12.197 12.043 11.888 11.73 11.57 11.409 11.247 11.083 10.919 10.755 10.59 10.425 10.26 10.096 9.932 9.768 9.605 9.444 9.283 9.123 8.965 8.808 8.652 8.497 8.345 8.194 8.044 7.897 7.751 7.607 7.464 7.324 7.186 7.049 6.914 6.782 6.651 6.523 6.396 6.271 6.149 6.028 5.909 5.792 5.678 5.565 5.454 5.345 5.238 5.133 5.029 4.928 4.828 4.73 4.634 4.54 4.448 4.357 4.268 4.181 4.095 4.011 3.929 3.848 3.768 3.691 3.614 3.54 3.466 3.395 3.324 3.255 3.188 3.121 3.057 2.993 2.931 2.869 2.81 2.751 2.693 2.637 2.582 2.528 2.475 2.423 2.372 2.323 2.274 2.226 2.18 2.134 2.089 2.045 2.002 1.96 1.919 1.878 1.839 1.8 1.762 1.725

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.49" PeakHeight="110.0" Num="3" Error="0.0">
-29.704 11.996 -2.65
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.49" EndFrequency="14.1" PeakHeight="393.187" Num="5" zHalfNm="296.452" Error="4.565">
-235.425 -32.944 0.271 0.495 1.311
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.895" Depth="0.125"/>
<TopsideChapman PeakHeight="393.187" PeakDensity="2466625.2" PeakScaleHeight="72.987" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
