<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 10:20:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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) 10:20:00</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">
FF202628910161020009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.141" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.250" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="376.641" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.555" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="276.348" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="217.532" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.701" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="78.167" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.588" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.141" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="104.220" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="91">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 275.833 276.667 277.500 278.333 279.167 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 295.000 295.000 292.500 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 296.700 298.401 300.101 301.801 303.502 305.202 306.902 308.603 310.303 312.003 313.704 315.404 317.104 318.804 320.505 322.205 323.905 325.606 327.306 329.006 330.707 332.407 334.107 335.808 337.508 339.208 340.909 342.609 344.309 346.010 347.710 349.410 351.111 352.811 354.511 356.212 357.912 359.612 361.312 363.013 364.713 366.413 368.114 369.814 371.514 373.215 376.641 380.000 390.000 405.000 444.513
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 63 63 0 0 0 72 75 0 0 0 72 75 0 69 72 78 0 72 72 75 75 63 60 0 78 69 0 78 81 63 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
</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 1.171875 0.390625 1.953125 -0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 1.171875 -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 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="164">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.628 90.0 95.0 100.0 105.0 110.0 115.0 115.309 120.0 120.619 125.0 125.928 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 276.348 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.716 2.212 2.472 2.555 2.445 2.431 2.431 2.431 2.533 2.555 2.777 3.043 3.299 3.546 3.787 4.023 4.255 4.486 4.717 4.947 5.179 5.414 5.651 5.891 6.136 6.386 6.641 6.901 7.168 7.442 7.722 8.009 8.301 8.597 8.893 9.182 9.454 9.69 9.863 9.946 9.95 9.943 9.913 9.859 9.785 9.692 9.582 9.457 9.318 9.168 9.008 8.838 8.662 8.48 8.292 8.101 7.908 7.712 7.516 7.319 7.122 6.927 6.732 6.54 6.35 6.163 5.978 5.797 5.619 5.445 5.274 5.107 4.944 4.785 4.63 4.479 4.331 4.188 4.049 3.914 3.783 3.655 3.532 3.412 3.296 3.183 3.074 2.969 2.867 2.768 2.672 2.579 2.49 2.403 2.319 2.239 2.16 2.085 2.012 1.941 1.873 1.807 1.744 1.682 1.623 1.566 1.511 1.458 1.406 1.356 1.308 1.262 1.218 1.174 1.133 1.093 1.054 1.017 0.981 0.946 0.912 0.88 0.849 0.819 0.79 0.762 0.735 0.709 0.683 0.659 0.636 0.613 0.591 0.57 0.55 0.53 0.512 0.493 0.476 0.459 0.443 0.427 0.412 0.397 0.383 0.369 0.356 0.344 0.331 0.32 0.308 0.297 0.287 0.277 0.267 0.257 0.248 0.239 0.231 0.223 0.215 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.555" PeakHeight="110.0" Num="3" Error="0.0">
-29.774 12.095 -2.693
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.555" EndFrequency="9.95" PeakHeight="276.348" Num="5" zHalfNm="217.532" Error="1.976">
-126.892 -35.764 13.136 -0.492 -0.408
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.928" Depth="0.124"/>
<TopsideChapman PeakHeight="276.348" PeakDensity="1228318.9" PeakScaleHeight="43.141" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
