<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-11 -284 20:00:00.000"
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="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: 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" >
2026.10.11 (284) 20:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628410112000009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.478" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.474" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="11.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" 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="1.992" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="409.368" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="314.981" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.464" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.747" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.129" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.600" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="134">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 330.000 335.000 340.000 340.000 342.500 345.000 345.000 347.500 350.000 345.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 400.000 405.000 406.164 407.329 408.493 409.658 410.822 411.986 413.151 414.315 415.479 416.644 417.808 418.973 420.137 421.301 422.466 423.630 424.795 425.959 427.123 428.288 429.452 430.616 431.781 432.945 434.110 435.274 436.438 437.603 438.767 439.932 441.096 442.260 443.425 444.589 445.753 446.918 448.082 449.247 450.411 451.575 452.740 453.904 455.068 456.233 457.397 458.562 459.726 460.890 462.055 463.219 464.384 465.548 466.712 467.877 469.041 470.205 471.370 472.534 473.699 474.863 476.027 477.192 478.356 479.521 480.685 481.849 483.014 484.178 485.342 486.507 487.671 488.836 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 563.494 573.825 586.661 603.040 624.663 654.529 698.461
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 63 69 63 72 75 0 75 78 69 78 81 75 78 78 78 66 69 66 78 66 75 81 78 81 72 75 66 72 66 75 0 0 81 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 51 63 57 63 60 66 63 66 66 63 66 0 69 0 69 66 66 66 63 63 60 54 51 45 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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -1.171875 -2.734375 -0.390625 2.734375 -2.734375 -0.390625 2.734375 1.953125 2.734375 1.171875 1.171875 1.171875 2.734375 1.171875 -2.734375 -0.390625 2.734375 -1.171875 2.734375 0.390625 -0.390625 -2.734375 -1.953125 1.171875 1.171875 -0.390625 2.734375 -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 -1.171875 -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" >
89.762 90.0 95.0 100.0 105.0 110.0 115.0 118.257 120.0 125.0 126.515 130.0 134.772 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 409.368 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.335 1.725 1.928 1.992 1.944 1.859 1.859 1.859 1.859 1.915 1.992 1.998 2.144 2.3 2.463 2.63 2.8 2.971 3.143 3.314 3.485 3.656 3.828 3.999 4.171 4.344 4.517 4.692 4.868 5.046 5.225 5.406 5.59 5.776 5.964 6.155 6.349 6.545 6.745 6.948 7.154 7.364 7.578 7.794 8.015 8.239 8.467 8.698 8.933 9.17 9.411 9.653 9.896 10.14 10.383 10.624 10.861 11.091 11.311 11.519 11.711 11.883 12.03 12.148 12.235 12.286 12.3 12.3 12.292 12.274 12.244 12.204 12.154 12.095 12.027 11.951 11.867 11.776 11.679 11.576 11.466 11.352 11.233 11.11 10.982 10.851 10.717 10.581 10.441 10.3 10.157 10.012 9.866 9.719 9.571 9.423 9.274 9.126 8.977 8.828 8.68 8.533 8.386 8.24 8.095 7.951 7.808 7.667 7.526 7.388 7.25 7.114 6.98 6.847 6.716 6.587 6.459 6.333 6.209 6.087 5.967 5.848 5.732 5.617 5.504 5.392 5.283 5.176 5.07 4.966 4.864 4.764 4.666 4.569 4.474 4.381 4.29 4.2 4.112 4.026 3.941 3.858 3.777 3.697 3.619 3.542 3.467 3.393 3.321 3.251 3.181 3.113 3.047 2.981 2.918 2.855 2.794 2.734 2.675 2.617 2.561 2.506 2.452 2.399 2.347 2.297 2.247 2.198 2.151 2.104 2.059 2.014 1.97 1.928 1.886 1.845 1.805 1.766 1.727 1.69 1.653 1.617 1.582 1.547 1.514 1.481

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.992" PeakHeight="110.0" Num="3" Error="0.0">
-29.057 11.101 -2.282
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.992" EndFrequency="12.3" PeakHeight="409.368" Num="5" zHalfNm="314.981" Error="2.641">
-242.776 -50.118 20.528 -0.993 -1.237
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="24.772" Depth="0.133"/>
<TopsideChapman PeakHeight="409.368" PeakDensity="1877047.1" PeakScaleHeight="70.6" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
