<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 19:40:00.000"
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) 19:40:00</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">
FF202629010171940009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.744" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.933" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.224" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="347.395" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.230" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.469" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="114.654" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.364" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.735" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="134.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="116">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
315.000 310.000 310.833 311.667 312.500 313.333 314.167 315.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 326.000 327.000 328.000 329.000 330.000 330.000 331.301 332.603 333.904 335.205 336.507 337.808 339.110 340.411 341.712 343.014 344.315 345.616 346.918 348.219 349.521 350.822 352.123 353.425 354.726 356.027 357.329 358.630 359.932 361.233 362.534 363.836 365.137 366.438 367.740 369.041 370.342 371.644 372.945 374.247 375.548 376.849 378.151 379.452 380.753 382.055 383.356 384.658 385.959 387.260 388.562 389.863 391.164 392.466 393.767 395.068 396.370 397.671 398.973 400.274 401.575 402.877 404.178 405.479 406.781 408.082 409.384 410.685 411.986 413.288 414.589 415.890 417.192 418.493 419.795 421.096 422.397 423.699 425.000 425.000 425.000 435.000 430.000 435.000 440.000 442.762 445.840 449.291 453.186 457.619 462.708 468.611 475.539 483.787 493.769 506.098 521.711 542.123 569.948 610.118
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 72 0 0 0 0 0 72 81 78 66 60 66 0 72 69 0 0 0 0 0 69 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 48 54 54 45 60 60 60 63 60 63 60 60 57 63 0 0 63 63 60 0 54 45
</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 1.171875 2.734375 -0.390625 0.390625 -2.734375 2.734375 1.953125 -0.390625 -2.734375 0.390625 1.171875 -1.171875 -2.734375 -1.953125 1.953125 2.734375 -2.734375 2.734375 1.171875 1.171875 -0.390625 -1.953125 0.390625 1.171875 2.734375 2.734375 0.390625 -1.953125 2.734375 2.734375 -2.734375 2.734375 1.953125 -2.734375 2.734375 1.953125 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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" >
89.702 90.0 95.0 100.0 105.0 110.0 115.0 116.999 120.0 123.998 125.0 130.0 130.997 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.395 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.225 1.492 1.926 2.152 2.224 2.159 2.096 2.096 2.096 2.114 2.206 2.224 2.376 2.573 2.777 2.986 3.199 3.415 3.634 3.855 4.077 4.302 4.529 4.757 4.988 5.221 5.456 5.693 5.933 6.175 6.419 6.667 6.917 7.169 7.425 7.683 7.944 8.207 8.473 8.741 9.011 9.281 9.553 9.824 10.093 10.359 10.619 10.872 11.112 11.335 11.537 11.711 11.849 11.945 11.994 12.0 11.998 11.982 11.952 11.908 11.85 11.781 11.701 11.61 11.509 11.4 11.283 11.158 11.026 10.888 10.745 10.598 10.446 10.29 10.131 9.97 9.806 9.641 9.474 9.307 9.138 8.97 8.801 8.633 8.465 8.298 8.131 7.966 7.802 7.64 7.479 7.321 7.163 7.008 6.855 6.704 6.555 6.409 6.265 6.123 5.983 5.846 5.711 5.579 5.449 5.322 5.197 5.074 4.954 4.836 4.721 4.608 4.498 4.389 4.283 4.18 4.078 3.979 3.882 3.787 3.695 3.604 3.516 3.429 3.345 3.262 3.182 3.103 3.026 2.951 2.878 2.806 2.736 2.668 2.601 2.536 2.473 2.411 2.351 2.292 2.234 2.178 2.124 2.07 2.018 1.968 1.918 1.87 1.823 1.777 1.732 1.688 1.646 1.604 1.564 1.524 1.486 1.448 1.412 1.376 1.341 1.307 1.274 1.242 1.211 1.18 1.15 1.121 1.093 1.065 1.038 1.012 0.986 0.961 0.937 0.913 0.89 0.867 0.845 0.824 0.803 0.783 0.763 0.743 0.725 0.706 0.688

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.224" PeakHeight="110.0" Num="3" Error="0.0">
-29.385 11.549 -2.462
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.224" EndFrequency="12.0" PeakHeight="347.395" Num="5" zHalfNm="265.23" Error="2.079">
-194.422 -34.98 15.691 -2.694 0.0070
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="20.997" Depth="0.128"/>
<TopsideChapman PeakHeight="347.395" PeakDensity="1786600.5" PeakScaleHeight="60.735" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
