<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 11:50:00.000"
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 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) 11:50:00</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">
FF202628910161150009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.798" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.940" 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="11.050" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="447.151" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.071" 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="/" />
<Modeled Name="foF1p" Val="4.209" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="324.571" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.079" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.970" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="110.158" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.851" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.997" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.990" 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="98">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 326.841 328.682 330.523 332.363 334.204 336.045 337.886 339.727 341.568 343.408 345.249 347.090 348.931 350.772 352.613 354.453 356.294 358.135 359.976 361.817 363.658 365.499 367.339 369.180 371.021 372.862 374.703 376.544 378.384 380.225 382.066 383.907 385.748 387.589 389.429 391.270 393.111 394.952 396.793 398.634 400.475 402.315 404.156 405.997 407.838 409.679 411.520 413.360 415.201 417.042 418.883 420.724 422.565 424.405 426.246 428.087 429.928 430.658 431.470 432.380 433.405 434.569 435.903 437.446 439.252 441.394 443.977 447.151 451.145 455.000 465.000 475.000 490.000 515.000 571.749
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 69 69 0 72 0 0 69 0 72 69 0 69 0 69 69 60 0 0 0 0 51 51 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 2.734375 -0.390625 0.390625 0.390625 2.734375 0.390625 0.390625 -1.953125 0.390625 -2.734375 1.171875 -0.390625 -1.953125 1.171875 0.390625 -2.734375 -2.734375 1.171875 -2.734375 0.390625 -0.390625 1.953125 -2.734375 0.390625 0.390625 -1.953125 1.953125 2.734375 1.171875 -1.953125 -1.171875 0.390625 -2.734375 0.390625 2.734375 -1.171875 1.953125 -0.390625 2.734375 -1.171875 2.734375 -1.171875 1.171875 1.171875 -1.171875 1.953125 0.390625 1.171875 1.171875 0.390625 -1.171875 -2.734375 2.734375 -2.734375 -0.390625 -1.171875 0.390625 0.390625 0.390625 -1.171875 -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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.534 90.0 95.0 100.0 105.0 110.0 112.901 115.0 115.801 118.702 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.571 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.065 2.658 2.971 3.071 2.949 2.949 2.949 3.071 3.126 3.337 3.542 3.74 3.933 4.121 4.305 4.485 4.663 4.84 5.015 5.189 5.363 5.537 5.712 5.888 6.065 6.244 6.424 6.607 6.792 6.98 7.171 7.365 7.563 7.764 7.969 8.177 8.39 8.606 8.825 9.047 9.27 9.493 9.714 9.929 10.133 10.318 10.477 10.6 10.677 10.7 10.7 10.692 10.671 10.639 10.594 10.54 10.475 10.4 10.317 10.226 10.128 10.023 9.912 9.795 9.674 9.548 9.418 9.284 9.148 9.009 8.867 8.724 8.579 8.434 8.287 8.14 7.993 7.846 7.698 7.552 7.406 7.26 7.116 6.973 6.831 6.691 6.551 6.414 6.278 6.144 6.012 5.881 5.752 5.626 5.501 5.379 5.258 5.14 5.023 4.909 4.797 4.686 4.578 4.472 4.368 4.267 4.167 4.069 3.973 3.879 3.788 3.698 3.61 3.524 3.44 3.357 3.277 3.198 3.121 3.046 2.972 2.9 2.83 2.761 2.694 2.629 2.565 2.502 2.441 2.382 2.323 2.267 2.211 2.157 2.104 2.052 2.002 1.953 1.905 1.858 1.812 1.767 1.724 1.681 1.64 1.599 1.56 1.521 1.484 1.447 1.411 1.376 1.342 1.309 1.277 1.245 1.214 1.184 1.155 1.126 1.098 1.071 1.045 1.019 0.993 0.969 0.945 0.921 0.898 0.876 0.854 0.833 0.812 0.792 0.773 0.753 0.735 0.716 0.699 0.681 0.664 0.648 0.632 0.616 0.601 0.586

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.071" PeakHeight="110.0" Num="3" Error="0.0">
-30.254 12.789 -3.001
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.071" EndFrequency="10.7" PeakHeight="324.571" Num="5" zHalfNm="240.079" Error="2.202">
-172.749 -48.708 16.044 0.252 -0.708
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.702" Depth="0.122"/>
<TopsideChapman PeakHeight="324.571" PeakDensity="1420471.5" PeakScaleHeight="61.997" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
