<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 11:20:00.000"
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) 11:20:00</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">
FF202628910161120009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.937" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.693" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.717" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.935" 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="/" />
<Modeled Name="foF1p" Val="4.141" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="301.504" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.312" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.971" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="102.745" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.905" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.034" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="134.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="84">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 310.000 311.667 313.333 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 316.484 317.968 319.453 320.937 322.421 323.905 325.389 326.873 328.358 329.842 331.326 332.810 334.294 335.779 337.263 338.747 340.231 341.715 343.200 344.684 346.168 347.652 349.136 350.620 352.105 353.589 355.073 356.557 358.041 359.526 361.010 362.494 363.978 365.462 366.946 368.431 369.915 371.399 372.883 374.367 375.852 377.336 378.820 380.304 381.788 383.273 384.757 386.241 387.725 389.209 390.693 392.178 393.662 395.146 397.732 400.717 404.201 408.319 413.263 420.000 425.000 435.000 450.000 470.000 495.000 540.914
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 69 0 0 0 0 66 0 51 0 0 78 78 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
</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 2.734375 -2.734375 -1.953125 1.953125 2.734375 -0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 2.734375 -0.390625 1.171875 0.390625 1.953125 2.734375 1.953125 -2.734375 -0.390625 1.953125 -2.734375 -2.734375 -1.953125 0.390625 -2.734375 -1.953125 2.734375 1.953125 0.390625 -1.171875 -0.390625 2.734375 1.171875 0.390625 -0.390625 0.390625 0.390625 -0.390625 1.953125 -0.390625 0.390625 2.734375 2.734375 1.953125 -0.390625
</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" >
89.556 90.0 95.0 100.0 105.0 110.0 113.509 115.0 117.018 120.0 120.527 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 301.504 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.973 2.541 2.84 2.935 2.813 2.813 2.813 2.917 2.935 3.128 3.359 3.596 3.833 4.065 4.292 4.513 4.73 4.943 5.153 5.361 5.568 5.774 5.98 6.187 6.395 6.604 6.815 7.029 7.245 7.463 7.685 7.91 8.139 8.37 8.604 8.839 9.075 9.31 9.54 9.761 9.967 10.149 10.297 10.399 10.447 10.45 10.446 10.428 10.396 10.35 10.292 10.222 10.142 10.052 9.953 9.845 9.731 9.609 9.482 9.349 9.211 9.07 8.925 8.777 8.627 8.474 8.32 8.165 8.009 7.853 7.696 7.54 7.384 7.229 7.075 6.922 6.77 6.62 6.472 6.325 6.18 6.037 5.896 5.757 5.62 5.486 5.354 5.224 5.097 4.972 4.849 4.729 4.611 4.496 4.383 4.273 4.164 4.059 3.955 3.854 3.755 3.658 3.564 3.472 3.382 3.294 3.208 3.125 3.043 2.963 2.885 2.81 2.736 2.664 2.593 2.525 2.458 2.393 2.329 2.268 2.207 2.149 2.091 2.036 1.982 1.929 1.877 1.827 1.778 1.731 1.684 1.639 1.595 1.553 1.511 1.47 1.431 1.393 1.355 1.319 1.283 1.249 1.215 1.183 1.151 1.12 1.09 1.06 1.032 1.004 0.977 0.951 0.925 0.9 0.876 0.852 0.829 0.807 0.785 0.764 0.743 0.723 0.704 0.685 0.666 0.648 0.631 0.614 0.597 0.581 0.565 0.55 0.535 0.521 0.507 0.493 0.48 0.467 0.454 0.442 0.43 0.418 0.407 0.396 0.385 0.375

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.935" PeakHeight="110.0" Num="3" Error="0.0">
-30.14 12.621 -2.925
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.935" EndFrequency="10.45" PeakHeight="301.504" Num="5" zHalfNm="223.312" Error="2.599">
-156.931 -37.187 15.057 -1.064 -0.852
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.527" Depth="0.122"/>
<TopsideChapman PeakHeight="301.504" PeakDensity="1354869.8" PeakScaleHeight="57.034" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
