<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 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="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" >
2026.10.16 (289) 19:30:00</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">
FF202628910161930009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.671" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.250" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.331" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="364.935" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.584" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.458" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.365" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.327" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.003" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="145.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.630" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="144">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 280.000 281.154 282.308 283.462 284.615 285.769 286.923 288.077 289.231 290.385 291.538 292.692 293.846 295.000 296.154 297.308 298.462 299.615 300.769 301.923 303.077 304.231 305.385 306.538 307.692 308.846 310.000 315.000 315.000 312.500 310.000 311.667 313.333 315.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 326.250 327.500 328.750 330.000 331.250 332.500 333.750 335.000 335.000 330.000 331.645 333.289 334.934 336.579 338.224 339.868 341.513 343.158 344.803 346.447 348.092 349.737 351.382 353.026 354.671 356.316 357.961 359.605 361.250 362.895 364.539 366.184 367.829 369.474 371.118 372.763 374.408 376.053 377.697 379.342 380.987 382.632 384.276 385.921 387.566 389.211 390.855 392.500 394.145 395.789 397.434 399.079 400.724 402.368 404.013 405.658 407.303 408.947 410.592 412.237 413.882 415.526 417.171 418.816 420.461 422.105 423.750 425.395 427.039 428.684 430.329 431.974 433.618 435.263 436.908 438.553 440.197 441.842 443.487 445.132 446.776 448.421 450.066 451.711 453.355 455.000 460.000 470.000 475.000 475.000 480.000 485.000 495.000 500.000 509.388 520.644 534.388 551.546 573.573 602.881 643.797
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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 78 0 75 0 0 0 75 57 0 72 72 75 72 0 0 0 0 0 0 0 0 0 0 0 72 75 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 63 60 48 48 63 60 57 60 60 57 60 60 57 42 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 0.390625 -2.734375 -2.734375 -1.171875 0.390625 1.953125 -0.390625 1.171875 -2.734375 0.390625 0.390625 2.734375 0.390625 -0.390625 -1.953125 1.171875 -0.390625 -2.734375 -2.734375 2.734375 -2.734375 -2.734375 2.734375 -0.390625 -0.390625 1.171875 0.390625 2.734375 2.734375 -0.390625 2.734375 -1.953125 -1.953125 -1.171875 -0.390625 2.734375 -2.734375 0.390625 -1.171875 -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 2.734375 -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" >
89.677 90.0 95.0 100.0 105.0 110.0 115.0 116.441 120.0 122.881 125.0 129.322 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.935 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.564 2.018 2.256 2.331 2.255 2.204 2.204 2.204 2.246 2.331 2.355 2.529 2.7 2.87 3.038 3.208 3.378 3.551 3.726 3.903 4.083 4.267 4.455 4.647 4.843 5.044 5.25 5.461 5.677 5.899 6.126 6.359 6.598 6.842 7.091 7.345 7.604 7.868 8.134 8.403 8.674 8.944 9.213 9.479 9.739 9.992 10.236 10.467 10.685 10.886 11.069 11.231 11.372 11.488 11.581 11.647 11.687 11.7 11.7 11.694 11.677 11.649 11.612 11.565 11.508 11.444 11.371 11.291 11.205 11.111 11.012 10.907 10.798 10.683 10.565 10.443 10.317 10.188 10.057 9.923 9.787 9.65 9.511 9.371 9.23 9.088 8.945 8.803 8.66 8.518 8.375 8.233 8.092 7.951 7.811 7.672 7.535 7.398 7.262 7.128 6.995 6.864 6.734 6.605 6.478 6.353 6.229 6.108 5.987 5.869 5.752 5.637 5.524 5.413 5.303 5.196 5.09 4.985 4.883 4.782 4.683 4.586 4.491 4.397 4.306 4.215 4.127 4.04 3.955 3.871 3.789 3.709 3.63 3.553 3.477 3.403 3.33 3.259 3.189 3.12 3.053 2.987 2.923 2.86 2.798 2.738 2.679 2.621 2.564 2.508 2.454 2.4 2.348 2.297 2.247 2.198 2.15 2.103 2.058 2.013 1.969 1.926 1.884 1.842 1.802 1.763 1.724 1.686 1.649 1.613 1.578 1.543 1.509 1.476 1.444 1.412 1.381 1.351 1.321 1.292 1.264 1.236 1.209 1.182 1.156 1.131

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.331" PeakHeight="110.0" Num="3" Error="0.0">
-29.518 11.735 -2.54
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.331" EndFrequency="11.7" PeakHeight="364.935" Num="5" zHalfNm="272.584" Error="2.3">
-215.348 -26.573 4.37 2.28 -0.342
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.322" Depth="0.127"/>
<TopsideChapman PeakHeight="364.935" PeakDensity="1698387.1" PeakScaleHeight="70.003" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
