<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 18:40:00.000"
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) 18:40:00</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">
FF202629010171840009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.725" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.703" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="11.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.731" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="362.820" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.075" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.315" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.885" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.590" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.993" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="152.530" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.720" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 315.000 316.667 318.333 320.000 315.000 315.000 316.250 317.500 318.750 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 337.500 340.000 340.000 341.118 342.237 343.355 344.474 345.592 346.711 347.829 348.947 350.066 351.184 352.303 353.421 354.539 355.658 356.776 357.895 359.013 360.132 361.250 362.368 363.487 364.605 365.724 366.842 367.961 369.079 370.197 371.316 372.434 373.553 374.671 375.789 376.908 378.026 379.145 380.263 381.382 382.500 383.618 384.737 385.855 386.974 388.092 389.211 390.329 391.447 392.566 393.684 394.803 395.921 397.039 398.158 399.276 400.395 401.513 402.632 403.750 404.868 405.987 407.105 408.224 409.342 410.461 411.579 412.697 413.816 414.934 416.053 417.171 418.289 419.408 420.526 421.645 422.763 423.882 425.000 435.000 435.000 435.000 435.000 445.000 450.000 450.000 455.000 460.000 470.000 475.000 480.000 490.000 500.000 510.000 525.000 540.000 565.000 600.000 650.153 731.205
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 66 0 0 0 0 66 60 0 0 0 75 72 72 75 72 75 75 78 75 72 78 78 75 78 81 78 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 0 0 0 0 0 60 45 60 57 60 54 54 57 54 54 54 57 63 66 69 66 66 63 54 0 42 42
</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 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 -1.953125 -2.734375 2.734375 -0.390625 2.734375 2.734375 2.734375 0.390625 -0.390625 -2.734375 -0.390625 1.953125 0.390625 -0.390625 2.734375 -2.734375 -2.734375 -0.390625 -1.953125 1.171875 -2.734375 1.171875 -2.734375 -1.953125 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 2.734375 1.171875 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" >
89.594 90.0 95.0 100.0 105.0 110.0 114.459 115.0 118.918 120.0 123.377 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 362.82 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.835 2.364 2.642 2.731 2.608 2.608 2.608 2.638 2.731 2.78 2.946 3.129 3.32 3.514 3.706 3.895 4.079 4.261 4.439 4.615 4.791 4.966 5.142 5.318 5.497 5.678 5.862 6.05 6.243 6.441 6.645 6.855 7.074 7.301 7.538 7.785 8.044 8.314 8.595 8.887 9.187 9.492 9.797 10.094 10.378 10.643 10.885 11.101 11.291 11.456 11.596 11.714 11.81 11.885 11.941 11.978 11.997 12.0 11.999 11.989 11.97 11.941 11.904 11.858 11.804 11.742 11.674 11.598 11.517 11.429 11.336 11.238 11.136 11.029 10.918 10.803 10.685 10.565 10.441 10.315 10.187 10.057 9.926 9.793 9.659 9.525 9.389 9.253 9.117 8.98 8.844 8.707 8.571 8.435 8.3 8.165 8.031 7.898 7.765 7.634 7.504 7.375 7.247 7.12 6.995 6.871 6.748 6.627 6.507 6.389 6.272 6.157 6.043 5.931 5.821 5.712 5.605 5.499 5.395 5.292 5.191 5.092 4.994 4.898 4.803 4.71 4.619 4.529 4.441 4.354 4.268 4.185 4.102 4.021 3.942 3.864 3.787 3.712 3.638 3.566 3.495 3.425 3.356 3.289 3.223 3.158 3.095 3.033 2.972 2.912 2.853 2.795 2.739 2.683 2.629 2.576 2.524 2.472 2.422 2.373 2.325 2.277 2.231 2.186 2.141 2.098 2.055 2.013 1.972 1.931 1.892 1.853 1.815 1.778 1.742 1.706 1.671 1.637 1.604 1.571 1.539 1.507 1.476 1.446 1.416 1.387

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.731" PeakHeight="110.0" Num="3" Error="0.0">
-29.952 12.35 -2.804
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.731" EndFrequency="12.0" PeakHeight="362.82" Num="5" zHalfNm="268.075" Error="4.185">
-221.98 -19.322 -4.933 11.127 -4.335
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.377" Depth="0.123"/>
<TopsideChapman PeakHeight="362.82" PeakDensity="1786600.5" PeakScaleHeight="74.993" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
