<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 19:50:00.000"
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) 19:50:00</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">
FF202628910161950009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.626" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.594" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="11.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" 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="2.109" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.612" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.929" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.472" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="141.433" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.300" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.224" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.730" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="123">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 295.000 295.000 297.000 299.000 301.000 303.000 305.000 306.429 307.857 309.286 310.714 312.143 313.571 315.000 310.000 311.250 312.500 313.750 315.000 315.000 315.000 315.000 315.000 317.500 320.000 322.500 325.000 326.000 327.000 328.000 329.000 330.000 331.987 333.974 335.962 337.949 339.936 341.923 343.910 345.897 347.885 349.872 351.859 353.846 355.833 357.821 359.808 361.795 363.782 365.769 367.756 369.744 371.731 373.718 375.705 377.692 379.679 381.667 383.654 385.641 387.628 389.615 391.603 393.590 395.577 397.564 399.551 401.538 403.526 405.513 407.500 409.487 411.474 413.462 415.449 417.436 419.423 421.410 423.397 425.385 427.372 429.359 431.346 433.333 435.321 437.308 439.295 441.282 443.269 445.256 447.244 449.231 451.218 453.205 455.192 457.179 459.167 461.154 463.141 465.128 467.115 469.103 471.090 473.077 475.064 477.051 479.038 481.026 483.013 485.000 485.000 490.000 500.000 507.649 516.939 528.460 543.128 562.434 588.992 627.832 690.037
</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 57 0 48 0 0 0 0 66 69 0 60 51 0 66 0 72 0 75 0 0 78 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 48 54 54 51 54 57 57 57 57 54 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 -1.171875 -1.171875 -0.390625 1.171875 -0.390625 1.171875 -2.734375 1.953125 -1.953125 2.734375 1.953125 -1.953125 2.734375 -1.171875 -0.390625 -1.953125 1.171875 2.734375 -2.734375 -2.734375 1.171875 1.953125 0.390625 -1.171875 1.953125 -1.171875 2.734375 -1.171875 -1.953125 -0.390625 -0.390625 1.953125 -2.734375 1.953125 -0.390625 1.171875 0.390625 0.390625 0.390625 -2.734375 0.390625 -1.953125 -1.953125 1.171875 2.734375 2.734375 -2.734375 1.953125 -1.953125 -1.953125 -2.734375 1.953125 -1.171875 -0.390625 -1.953125 1.953125 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 2.734375
</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" >
89.731 90.0 95.0 100.0 105.0 110.0 115.0 117.612 120.0 125.0 125.223 130.0 132.835 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.612 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.414 1.826 2.041 2.109 2.054 1.979 1.979 1.979 1.979 2.061 2.109 2.177 2.341 2.512 2.689 2.872 3.06 3.254 3.452 3.655 3.861 4.072 4.286 4.504 4.726 4.95 5.178 5.409 5.643 5.879 6.118 6.36 6.603 6.848 7.095 7.343 7.592 7.842 8.092 8.341 8.589 8.835 9.079 9.319 9.555 9.786 10.01 10.226 10.433 10.628 10.812 10.981 11.135 11.272 11.389 11.486 11.562 11.614 11.644 11.65 11.65 11.642 11.625 11.598 11.564 11.52 11.469 11.411 11.346 11.274 11.196 11.113 11.024 10.93 10.831 10.729 10.622 10.512 10.398 10.282 10.163 10.042 9.918 9.793 9.666 9.538 9.409 9.279 9.148 9.016 8.884 8.752 8.62 8.488 8.356 8.224 8.093 7.962 7.833 7.703 7.575 7.448 7.321 7.196 7.072 6.949 6.827 6.707 6.588 6.47 6.354 6.239 6.125 6.013 5.903 5.794 5.686 5.58 5.476 5.373 5.272 5.172 5.074 4.977 4.882 4.788 4.696 4.606 4.517 4.429 4.343 4.258 4.175 4.094 4.013 3.934 3.857 3.781 3.706 3.633 3.561 3.49 3.421 3.353 3.286 3.22 3.156 3.093 3.031 2.97 2.911 2.852 2.795 2.739 2.683 2.629 2.576 2.524 2.473 2.423 2.374 2.326 2.279 2.233 2.187 2.143 2.1 2.057 2.015 1.974 1.934 1.895 1.856 1.818 1.781 1.745 1.709 1.674 1.64 1.607 1.574 1.542 1.51 1.479 1.449 1.42

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.109" PeakHeight="110.0" Num="3" Error="0.0">
-29.228 11.334 -2.375
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.109" EndFrequency="11.65" PeakHeight="373.612" Num="5" zHalfNm="272.929" Error="1.8">
-230.2 -17.26 8.05 -1.363 -0.0040
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.835" Depth="0.13"/>
<TopsideChapman PeakHeight="373.612" PeakDensity="1683902.0" PeakScaleHeight="75.224" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
