<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 19:00:00.000"
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="15.0">
<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: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.10.17 (290) 19:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629010171900009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.750" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.143" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="2.590" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="348.371" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.669" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.385" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="123.788" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.729" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.661" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="144.020" 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="127">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 300.000 302.500 305.000 305.000 307.500 310.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 321.316 322.632 323.947 325.263 326.579 327.895 329.211 330.526 331.842 333.158 334.474 335.789 337.105 338.421 339.737 341.053 342.368 343.684 345.000 346.316 347.632 348.947 350.263 351.579 352.895 354.211 355.526 356.842 358.158 359.474 360.789 362.105 363.421 364.737 366.053 367.368 368.684 370.000 371.316 372.632 373.947 375.263 376.579 377.895 379.211 380.526 381.842 383.158 384.474 385.789 387.105 388.421 389.737 391.053 392.368 393.684 395.000 396.316 397.632 398.947 400.263 401.579 402.895 404.211 405.526 406.842 408.158 409.474 410.789 412.105 413.421 414.737 416.053 417.368 418.684 420.000 420.000 425.000 425.000 430.000 435.000 435.000 435.000 445.000 448.540 452.489 456.923 461.937 467.653 474.228 481.873 490.872 501.619 514.679 530.888 551.541 578.757 616.254
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 63 0 0 60 69 69 0 69 0 72 72 72 72 0 0 69 66 63 63 75 75 75 75 72 75 78 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 63 51 63 60 51 60 60 54 57 60 60 60 60 0 0 57 57 54 0 57 63 48
</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 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 -2.734375 -1.171875 2.734375 -0.390625 -1.953125 -1.953125 -1.171875 -2.734375 -1.171875 -2.734375 1.953125 1.953125 -1.953125 -1.171875 1.171875 -2.734375 1.171875 1.953125 -0.390625 2.734375 -2.734375 -2.734375 2.734375 0.390625 -1.953125 -1.953125 -2.734375 2.734375 -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 1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -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" >
89.621 90.0 95.0 100.0 105.0 110.0 115.0 115.139 120.0 120.277 125.0 125.416 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 348.371 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.739 2.242 2.506 2.59 2.473 2.466 2.466 2.466 2.58 2.59 2.764 2.966 3.174 3.384 3.593 3.8 4.006 4.21 4.412 4.615 4.818 5.022 5.228 5.436 5.646 5.86 6.077 6.299 6.525 6.756 6.993 7.235 7.484 7.738 7.999 8.266 8.539 8.817 9.098 9.382 9.666 9.948 10.224 10.492 10.748 10.988 11.209 11.408 11.582 11.731 11.852 11.945 12.009 12.043 12.05 12.049 12.039 12.016 11.983 11.938 11.883 11.818 11.745 11.663 11.573 11.476 11.372 11.262 11.147 11.026 10.9 10.771 10.637 10.5 10.36 10.218 10.073 9.926 9.778 9.629 9.478 9.327 9.175 9.023 8.871 8.719 8.568 8.417 8.266 8.117 7.968 7.821 7.675 7.53 7.386 7.244 7.103 6.965 6.827 6.692 6.558 6.426 6.296 6.168 6.042 5.918 5.795 5.675 5.557 5.44 5.326 5.213 5.103 4.994 4.888 4.783 4.681 4.58 4.481 4.384 4.289 4.196 4.104 4.014 3.927 3.84 3.756 3.673 3.592 3.513 3.435 3.359 3.285 3.212 3.14 3.071 3.002 2.935 2.87 2.805 2.743 2.681 2.621 2.562 2.505 2.448 2.393 2.34 2.287 2.235 2.185 2.136 2.087 2.04 1.994 1.949 1.905 1.862 1.82 1.779 1.738 1.699 1.66 1.623 1.586 1.55 1.515 1.48 1.447 1.414 1.382 1.35 1.32 1.29 1.26 1.232 1.204 1.176 1.15 1.123 1.098 1.073 1.048 1.025 1.001 0.978

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.59" PeakHeight="110.0" Num="3" Error="0.0">
-29.81 12.147 -2.716
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.59" EndFrequency="12.05" PeakHeight="348.371" Num="5" zHalfNm="259.669" Error="2.543">
-204.101 -26.629 5.865 3.767 -1.857
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.416" Depth="0.124"/>
<TopsideChapman PeakHeight="348.371" PeakDensity="1801519.9" PeakScaleHeight="67.661" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
