<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 20:30:00.000"
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) 20:30:00</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">
FF202628910162030009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.678" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.466" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.457" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="372.176" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="290.461" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.372" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="117.187" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.961" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.674" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="119">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 316.000 317.000 318.000 319.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 331.250 332.500 333.750 335.000 336.471 337.941 339.412 340.882 342.353 343.824 345.294 346.765 348.235 349.706 351.176 352.647 354.118 355.588 357.059 358.529 360.000 361.471 362.941 364.412 365.882 367.353 368.824 370.294 371.765 373.235 374.706 376.176 377.647 379.118 380.588 382.059 383.529 385.000 386.471 387.941 389.412 390.882 392.353 393.824 395.294 396.765 398.235 399.706 401.176 402.647 404.118 405.588 407.059 408.529 410.000 411.471 412.941 414.412 415.882 417.353 418.824 420.294 421.765 423.235 424.706 426.176 427.647 429.118 430.588 432.059 433.529 435.000 436.471 437.941 439.412 440.882 442.353 443.824 445.294 446.765 448.235 449.706 451.176 452.647 454.118 455.588 457.059 458.529 460.000 465.000 475.000 475.000 480.000 490.000 495.000 500.000 509.388 520.644 534.388 551.546 573.573 602.881
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 72 0 0 0 0 78 69 0 0 81 78 0 81 81 0 81 0 0 0 78 0 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 0 0 0 0 0 60 60 51 60 54 51 51 54 60 60 63 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -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 -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 -1.171875 -1.953125 -0.390625 -0.390625 1.953125 0.390625 -2.734375 -0.390625 1.171875 1.171875 1.171875 1.953125 -1.171875 2.734375 1.953125 -2.734375 0.390625 -1.171875 2.734375 -2.734375 0.390625 -0.390625 2.734375 -0.390625 0.390625 2.734375 2.734375 1.953125 -1.171875 -1.953125 -1.953125 1.171875 1.953125 1.953125 -0.390625 -1.171875 2.734375 2.734375 2.734375 1.171875 1.171875 2.734375 0.390625 2.734375 -1.953125 2.734375 0.390625 -1.953125 2.734375 1.171875 0.390625 1.953125 -1.171875 -2.734375 0.390625 0.390625 1.171875 -2.734375 1.953125 -1.171875 -0.390625 1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 1.953125
</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" >
89.955 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.585 125.0 130.0 133.17 135.0 140.0 144.755 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.176 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.204 0.974 1.262 1.41 1.457 1.43 1.347 1.308 1.308 1.308 1.308 1.332 1.396 1.457 1.464 1.606 1.76 1.926 2.101 2.287 2.482 2.685 2.895 3.112 3.334 3.562 3.795 4.032 4.273 4.519 4.768 5.02 5.276 5.536 5.798 6.064 6.333 6.604 6.879 7.156 7.435 7.716 7.998 8.282 8.567 8.851 9.135 9.416 9.694 9.967 10.233 10.49 10.733 10.961 11.169 11.351 11.505 11.624 11.706 11.746 11.75 11.748 11.731 11.701 11.657 11.601 11.532 11.453 11.363 11.264 11.157 11.041 10.918 10.789 10.654 10.513 10.368 10.219 10.066 9.91 9.752 9.592 9.429 9.266 9.102 8.937 8.771 8.606 8.441 8.276 8.113 7.95 7.788 7.628 7.469 7.311 7.156 7.002 6.85 6.7 6.552 6.407 6.263 6.122 5.983 5.846 5.712 5.58 5.451 5.324 5.199 5.077 4.957 4.84 4.724 4.612 4.501 4.393 4.287 4.184 4.082 3.983 3.886 3.791 3.699 3.608 3.52 3.433 3.348 3.266 3.185 3.106 3.029 2.954 2.881 2.809 2.739 2.671 2.604 2.539 2.476 2.414 2.353 2.294 2.237 2.181 2.126 2.073 2.021 1.97 1.92 1.872 1.825 1.779 1.734 1.69 1.647 1.606 1.565 1.526 1.487 1.45 1.413 1.377 1.342 1.308 1.275 1.243 1.211 1.181 1.151 1.122 1.093 1.066 1.039 1.012 0.987 0.962 0.937 0.913 0.89 0.868 0.846 0.824 0.803 0.783 0.763

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.457" PeakHeight="110.0" Num="3" Error="0.0">
-28.021 9.758 -1.782
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.457" EndFrequency="11.75" PeakHeight="372.176" Num="5" zHalfNm="290.461" Error="0.89">
-212.454 -25.481 14.143 -3.988 0.359
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="34.755" Depth="0.149"/>
<TopsideChapman PeakHeight="372.176" PeakDensity="1712934.2" PeakScaleHeight="60.674" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
