<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-10 -283 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="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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.10.10 (283) 18:40:00</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">
FF202628310101840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.921" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.756" 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="11.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="437.116" 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="2.743" 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="318.452" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="261.808" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.314" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.526" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.181" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.142" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="116.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="129">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.890 336.781 337.671 338.562 339.452 340.342 341.233 342.123 343.014 343.904 344.795 345.685 346.575 347.466 348.356 349.247 350.137 351.027 351.918 352.808 353.699 354.589 355.479 356.370 357.260 358.151 359.041 359.932 360.822 361.712 362.603 363.493 364.384 365.274 366.164 367.055 367.945 368.836 369.726 370.616 371.507 372.397 373.288 374.178 375.068 375.959 376.849 377.740 378.630 379.521 380.411 381.301 382.192 383.082 383.973 384.863 385.753 386.644 387.534 388.425 389.315 390.205 391.096 391.986 392.877 393.767 394.658 395.548 396.438 397.329 398.219 399.110 400.000 400.000 402.000 404.000 406.000 408.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 421.166 422.493 424.020 425.792 427.877 430.363 433.379 437.116 441.865
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 69 0 72 0 72 72 69 69 72 72 72 72 72 72 75 75 75 72 72 0 0 75 72 72 72 72 75 75 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 72 0 0 0 66 60 0 0 0 0 66 69 69 63 63 69 69 63 66 69 60 66 48 60 0 51 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 1.953125 0.390625 0.390625 0.390625 1.953125 1.953125 0.390625 0.390625 -2.734375 1.171875 2.734375 -0.390625 1.953125 1.953125 -1.953125 -0.390625 1.171875 -2.734375 2.734375 2.734375 0.390625 -0.390625 2.734375 -1.953125 -1.171875 -2.734375 -0.390625 1.171875 -1.171875 -0.390625 -1.953125 2.734375 2.734375 -1.953125 0.390625 0.390625 2.734375 -2.734375 -1.171875 -0.390625 0.390625 2.734375 -1.953125 2.734375 2.734375 0.390625 0.390625 0.390625 0.390625 1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="175">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.592 90.0 95.0 100.0 105.0 110.0 114.399 115.0 118.798 120.0 123.197 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 318.452 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.843 2.375 2.654 2.743 2.62 2.62 2.62 2.654 2.743 2.853 3.112 3.335 3.539 3.733 3.919 4.1 4.279 4.455 4.631 4.807 4.984 5.162 5.342 5.524 5.708 5.896 6.088 6.283 6.484 6.689 6.9 7.117 7.34 7.572 7.811 8.06 8.318 8.588 8.87 9.165 9.476 9.802 10.145 10.505 10.877 11.251 11.597 11.843 11.9 11.898 11.873 11.818 11.736 11.629 11.501 11.352 11.187 11.006 10.812 10.607 10.392 10.17 9.941 9.708 9.471 9.232 8.991 8.75 8.509 8.27 8.032 7.797 7.565 7.336 7.111 6.889 6.672 6.46 6.252 6.049 5.851 5.658 5.47 5.287 5.108 4.935 4.767 4.604 4.446 4.292 4.143 3.999 3.86 3.725 3.594 3.467 3.345 3.227 3.112 3.002 2.895 2.792 2.692 2.596 2.503 2.413 2.327 2.243 2.163 2.085 2.01 1.937 1.868 1.8 1.735 1.672 1.612 1.554 1.498 1.443 1.391 1.341 1.292 1.245 1.2 1.157 1.115 1.074 1.035 0.998 0.961 0.926 0.893 0.86 0.829 0.799 0.77 0.742 0.715 0.689 0.664 0.64 0.617 0.594 0.573 0.552 0.532 0.512 0.494 0.476 0.458 0.442 0.426 0.41 0.395 0.381 0.367 0.354 0.341 0.328 0.316 0.305 0.294 0.283 0.273 0.263 0.253 0.244 0.235 0.227 0.218 0.21 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.743" PeakHeight="110.0" Num="3" Error="0.0">
-29.963 12.366 -2.811
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.743" EndFrequency="11.9" PeakHeight="318.452" Num="5" zHalfNm="261.808" Error="2.947">
-146.744 -69.822 20.013 1.872 -0.574
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.197" Depth="0.123"/>
<TopsideChapman PeakHeight="318.452" PeakDensity="1756947.9" PeakScaleHeight="42.142" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
