<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 18:20:00.000"
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: 50% PACIFIC flags: F2o cusp not found, 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) 18:20:00</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">
FF202628910161820009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.477" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.623" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="506.298" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.853" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="385.749" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.138" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.235" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="159.575" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.105" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.287" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="191.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 345.000 345.000 350.000 351.667 353.333 355.000 355.000 355.000 355.000 357.402 359.803 362.205 364.606 367.008 369.409 371.811 374.212 376.614 379.016 381.417 383.819 386.220 388.622 391.023 393.425 395.827 398.228 400.630 403.031 405.433 407.834 410.236 412.637 415.039 417.441 419.842 422.244 424.645 427.047 429.448 431.850 434.252 436.653 439.055 441.456 443.858 446.259 448.661 451.062 453.464 455.866 458.267 460.669 463.070 465.472 467.873 470.275 472.676 475.078 477.480 479.881 482.283 484.684 487.086 489.487 491.889 494.291 496.692 499.094 501.495 503.897 506.298 508.700 513.480 520.000 525.000 530.000 540.000 545.000 555.000 565.000 575.000 585.000 600.000 620.000 640.000 665.000 693.172
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 66 0 57 0 69 0 0 69 69 0 0 69 72 72 69 63 0 0 0 0 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 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 -1.953125 0.390625 -2.734375 -1.953125 -2.734375 -1.171875 -2.734375 -2.734375 1.171875 -1.171875 -0.390625 2.734375 1.171875 2.734375 2.734375 -1.953125 2.734375 -1.171875 1.953125 -0.390625 -2.734375 -0.390625 -2.734375 2.734375 1.953125 -1.953125 -2.734375 1.171875 -2.734375 -2.734375 1.171875 0.390625 1.953125 1.953125 0.390625 -1.953125 2.734375 -1.171875 1.953125 -2.734375 -1.171875 1.171875 -0.390625 2.734375 -0.390625 -2.734375 0.390625 -0.390625 0.390625 0.390625 -2.734375 -2.734375 -2.734375 1.953125 -0.390625 -2.734375 -1.953125 -2.734375 0.390625 -0.390625 -0.390625 2.734375 -2.734375 0.390625 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" >
89.572 90.0 95.0 100.0 105.0 110.0 113.883 115.0 117.766 120.0 121.649 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.749 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.917 2.47 2.76 2.853 2.731 2.731 2.731 2.801 2.853 2.962 3.125 3.286 3.447 3.608 3.768 3.928 4.087 4.247 4.407 4.567 4.727 4.887 5.048 5.209 5.371 5.533 5.696 5.859 6.023 6.188 6.353 6.519 6.685 6.853 7.021 7.19 7.359 7.529 7.699 7.87 8.04 8.211 8.382 8.553 8.723 8.892 9.059 9.225 9.388 9.548 9.704 9.855 10.0 10.137 10.264 10.381 10.485 10.575 10.647 10.702 10.736 10.75 10.75 10.748 10.738 10.723 10.701 10.674 10.64 10.602 10.558 10.509 10.456 10.398 10.336 10.27 10.201 10.128 10.051 9.972 9.89 9.805 9.717 9.628 9.536 9.443 9.347 9.25 9.152 9.053 8.952 8.851 8.748 8.645 8.541 8.437 8.332 8.227 8.122 8.017 7.912 7.807 7.702 7.598 7.493 7.389 7.286 7.183 7.08 6.978 6.877 6.777 6.677 6.578 6.479 6.382 6.285 6.19 6.095 6.001 5.908 5.816 5.725 5.635 5.546 5.458 5.371 5.286 5.201 5.117 5.034 4.953 4.872 4.793 4.714 4.637 4.56 4.485 4.411 4.338 4.265 4.194 4.124 4.055 3.987 3.92 3.854 3.789 3.725 3.662 3.599 3.538 3.478 3.419 3.36 3.303 3.246 3.191 3.136 3.082 3.029 2.977 2.926 2.875 2.825 2.777 2.729 2.681 2.635 2.589 2.544 2.5 2.456 2.414 2.372 2.33 2.29 2.25 2.21 2.172 2.134 2.097 2.06 2.024 1.988 1.954

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.853" PeakHeight="110.0" Num="3" Error="0.0">
-30.068 12.517 -2.877
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.853" EndFrequency="10.75" PeakHeight="385.749" Num="5" zHalfNm="267.138" Error="1.796">
-239.648 -38.345 15.847 -2.056 0.102
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.649" Depth="0.122"/>
<TopsideChapman PeakHeight="385.749" PeakDensity="1433777.9" PeakScaleHeight="87.287" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
