<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-13 -286 20:20:00.000"
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 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" >
2026.10.13 (286) 20:20:00</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">
FF202628610132020009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.573" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.102" 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="12.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.664" 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="381.111" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="292.288" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.415" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.043" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.923" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.869" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 347.500 350.000 350.000 352.013 354.026 356.039 358.052 360.065 362.078 364.091 366.104 368.117 370.130 372.143 374.156 376.169 378.182 380.195 382.208 384.221 386.234 388.247 390.260 392.273 394.286 396.299 398.312 400.325 402.338 404.351 406.364 408.377 410.390 412.403 414.416 416.429 418.442 420.455 422.468 424.481 426.494 428.506 430.519 432.532 434.545 436.558 438.571 440.584 442.597 444.610 446.623 448.636 450.649 452.662 454.675 456.688 458.701 460.714 462.727 464.740 466.753 468.766 470.779 472.792 474.805 476.818 478.831 480.844 482.857 484.870 486.883 488.896 490.909 492.922 494.935 496.948 498.961 500.974 502.987 505.000 510.000 515.000 525.000 530.000 545.000 555.000 570.000 587.542 609.435
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 72 51 0 63 69 51 75 78 75 78 75 78 78 78 75 75 75 78 75 75 78 78 72 72 78 66 72 78 0 69 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 0 0 0 0 0 0 0 0 57 57 54 57 57 57 57 0 0 51
</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 -1.171875 -0.390625 2.734375 -1.171875 -0.390625 -0.390625 1.953125 -2.734375 -1.953125 2.734375 -0.390625 -1.953125 1.171875 0.390625 1.171875 -2.734375 0.390625 -0.390625 -1.171875 2.734375 2.734375 -0.390625 0.390625 1.953125 2.734375 -1.171875 1.171875 2.734375 1.953125 -1.953125 -1.171875 1.171875 1.953125 0.390625 2.734375 -1.171875 2.734375 2.734375 2.734375 1.171875 -2.734375 2.734375 -0.390625 0.390625 1.953125 -1.953125 -1.171875 1.953125 1.171875 -2.734375 2.734375 1.953125 1.953125 2.734375 0.390625 -0.390625 -0.390625 -2.734375 1.953125 0.390625 -1.171875 -2.734375 -1.171875 1.171875 1.953125 2.734375 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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" >
89.868 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.18 125.0 130.0 130.361 135.0 140.0 140.541 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 381.111 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.211 1.113 1.441 1.61 1.664 1.631 1.528 1.523 1.523 1.523 1.523 1.587 1.657 1.664 1.805 1.963 2.124 2.291 2.464 2.645 2.833 3.029 3.232 3.442 3.658 3.879 4.105 4.334 4.566 4.8 5.036 5.274 5.512 5.751 5.991 6.231 6.472 6.712 6.954 7.195 7.436 7.678 7.92 8.162 8.405 8.647 8.889 9.13 9.371 9.611 9.848 10.083 10.314 10.539 10.757 10.963 11.155 11.327 11.474 11.589 11.666 11.699 11.7 11.696 11.679 11.65 11.609 11.557 11.495 11.423 11.342 11.252 11.155 11.051 10.94 10.823 10.7 10.573 10.441 10.305 10.166 10.024 9.879 9.731 9.582 9.431 9.28 9.127 8.973 8.819 8.665 8.512 8.358 8.205 8.052 7.901 7.75 7.601 7.453 7.306 7.161 7.017 6.875 6.735 6.596 6.459 6.324 6.192 6.061 5.932 5.805 5.68 5.557 5.437 5.318 5.202 5.087 4.975 4.865 4.757 4.651 4.546 4.444 4.344 4.246 4.15 4.056 3.964 3.874 3.785 3.699 3.614 3.531 3.45 3.37 3.292 3.216 3.142 3.069 2.998 2.928 2.86 2.793 2.728 2.665 2.602 2.542 2.482 2.424 2.367 2.312 2.257 2.204 2.153 2.102 2.053 2.004 1.957 1.911 1.866 1.822 1.779 1.737 1.696 1.656 1.617 1.579 1.541 1.505 1.469 1.434 1.4 1.367 1.335 1.303 1.272 1.242 1.213 1.184 1.156 1.129 1.102 1.076 1.05 1.025 1.001 0.977

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.664" PeakHeight="110.0" Num="3" Error="0.0">
-28.483 10.342 -1.991
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.664" EndFrequency="11.7" PeakHeight="381.111" Num="5" zHalfNm="292.288" Error="2.765">
-221.052 -34.247 20.412 -7.558 1.875
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="30.541" Depth="0.141"/>
<TopsideChapman PeakHeight="381.111" PeakDensity="1698387.1" PeakScaleHeight="64.869" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
