<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-10 -283 15:20:00.000"
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="18.0">
<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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.10.10 (283) 15:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628310101520009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.658" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.836" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.392" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.361" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="352.338" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.838" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.995" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.391" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.700" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.058" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.060" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 351.250 352.500 353.750 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 366.419 367.838 369.257 370.676 372.095 373.514 374.932 376.351 377.770 379.189 380.608 382.027 383.446 384.865 386.284 387.703 389.122 390.541 391.959 393.378 394.797 396.216 397.635 399.054 400.473 401.892 403.311 404.730 406.149 407.568 408.986 410.405 411.824 413.243 414.662 416.081 417.500 418.919 420.338 421.757 423.176 424.595 426.014 427.432 428.851 430.270 431.689 433.108 434.527 435.946 437.365 438.784 440.203 441.622 443.041 444.459 445.878 447.297 448.716 450.135 451.554 452.973 454.392 455.811 457.230 458.649 460.068 461.486 462.905 464.324 465.743 467.162 468.581 470.000 465.000 470.000 475.000 480.000 485.000 490.009 495.814 502.618 510.706 520.478 532.520 547.730 567.544 594.429
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 48 48 51 51 48 48 51 51 0 48 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 0 0 0 0 0 45 57 54 51 51 51 51 54 51 54 54 51 51 51 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -2.734375 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 1.171875 -0.390625 1.171875 2.734375 -2.734375 -1.171875 -1.171875 -1.953125 1.171875 -1.953125 -2.734375 -1.953125 1.171875 -0.390625 -0.390625 2.734375 -2.734375 -1.171875 -1.171875 1.953125 1.171875 1.953125 2.734375 1.171875 2.734375 -1.953125 2.734375 -1.171875 1.171875 1.953125 -0.390625 -1.171875 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 1.953125 0.390625 2.734375 2.734375 0.390625 -2.734375 0.390625 0.390625 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.544 113.088 114.632 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 352.338 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.282 2.935 3.281 3.392 3.269 3.269 3.392 3.407 3.614 3.822 4.024 4.217 4.402 4.58 4.751 4.917 5.079 5.238 5.394 5.549 5.702 5.854 6.006 6.158 6.31 6.463 6.617 6.772 6.929 7.088 7.25 7.413 7.58 7.75 7.923 8.1 8.281 8.467 8.657 8.853 9.053 9.259 9.47 9.686 9.906 10.128 10.352 10.573 10.788 10.991 11.176 11.336 11.463 11.551 11.595 11.6 11.598 11.587 11.564 11.532 11.49 11.438 11.378 11.31 11.234 11.152 11.062 10.967 10.866 10.759 10.648 10.533 10.414 10.291 10.165 10.036 9.904 9.771 9.636 9.499 9.36 9.221 9.081 8.94 8.799 8.657 8.516 8.375 8.234 8.094 7.954 7.815 7.677 7.54 7.404 7.269 7.135 7.003 6.872 6.742 6.614 6.488 6.363 6.239 6.118 5.998 5.88 5.763 5.648 5.535 5.424 5.315 5.207 5.101 4.997 4.895 4.794 4.695 4.598 4.503 4.409 4.317 4.227 4.138 4.051 3.966 3.882 3.8 3.72 3.641 3.563 3.488 3.413 3.34 3.269 3.199 3.13 3.063 2.997 2.933 2.87 2.808 2.747 2.688 2.63 2.573 2.517 2.462 2.409 2.357 2.305 2.255 2.206 2.158 2.111 2.065 2.02 1.976 1.933 1.891 1.849 1.809 1.77 1.731 1.693 1.656 1.62 1.584 1.549 1.515 1.482 1.45 1.418 1.387 1.356 1.327 1.298 1.269 1.241 1.214 1.187 1.161 1.136 1.111 1.086 1.062

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.392" PeakHeight="110.0" Num="3" Error="0.0">
-30.501 13.153 -3.168
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.392" EndFrequency="11.6" PeakHeight="352.338" Num="5" zHalfNm="257.838" Error="3.157">
-196.829 -60.236 18.165 3.373 -2.179
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.632" Depth="0.123"/>
<TopsideChapman PeakHeight="352.338" PeakDensity="1669478.9" PeakScaleHeight="70.058" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
