<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-11 -284 20:20:00.000"
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" >
2026.10.11 (284) 20:20:00</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">
FF202628410112020009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.432" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.029" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" 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="11.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" 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="1.671" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="419.475" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="325.806" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.414" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.077" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.487" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.341" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 330.000 331.667 333.333 335.000 335.000 340.000 345.000 345.000 350.000 351.667 353.333 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 395.000 395.000 395.000 400.000 400.000 401.316 402.632 403.947 405.263 406.579 407.895 409.211 410.526 411.842 413.158 414.474 415.789 417.105 418.421 419.737 421.053 422.368 423.684 425.000 426.316 427.632 428.947 430.263 431.579 432.895 434.211 435.526 436.842 438.158 439.474 440.789 442.105 443.421 444.737 446.053 447.368 448.684 450.000 451.316 452.632 453.947 455.263 456.579 457.895 459.211 460.526 461.842 463.158 464.474 465.789 467.105 468.421 469.737 471.053 472.368 473.684 475.000 476.316 477.632 478.947 480.263 481.579 482.895 484.211 485.526 486.842 488.158 489.474 490.789 492.105 493.421 494.737 496.053 497.368 498.684 500.000 505.000 505.000 510.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 537.500 540.000 545.000 548.903 553.320 558.361 564.168 570.930 578.903 588.444 600.069 614.540 633.052 657.569 691.581
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 0 0 0 0 75 78 72 0 0 72 72 72 72 69 72 72 78 72 78 75 81 75 75 75 78 69 72 75 72 75 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 66 0 63 54 60 54 60 63 63 51 63 57 63 60 57 0 63 60 60 63 60 60 57 60 60 57 54 51 48 42
</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 -1.171875 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 1.171875 1.171875 0.390625 -1.171875 -0.390625 1.171875 1.953125 -0.390625 0.390625 -2.734375 -0.390625 -0.390625 2.734375 -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 2.734375 -1.171875 -0.390625 2.734375 2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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" >
89.865 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.135 125.0 130.0 130.271 135.0 140.0 140.406 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 419.475 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.212 1.118 1.447 1.617 1.671 1.637 1.534 1.53 1.53 1.53 1.53 1.596 1.665 1.671 1.795 1.936 2.083 2.236 2.392 2.553 2.717 2.884 3.054 3.225 3.4 3.576 3.754 3.934 4.117 4.301 4.487 4.676 4.866 5.059 5.253 5.45 5.649 5.851 6.054 6.261 6.469 6.68 6.894 7.11 7.329 7.55 7.774 8.001 8.23 8.461 8.695 8.931 9.169 9.408 9.649 9.891 10.133 10.374 10.613 10.848 11.079 11.302 11.515 11.714 11.894 12.051 12.18 12.276 12.333 12.35 12.35 12.342 12.323 12.292 12.251 12.199 12.138 12.068 11.989 11.903 11.809 11.708 11.601 11.489 11.371 11.248 11.12 10.989 10.854 10.716 10.576 10.433 10.287 10.14 9.992 9.842 9.691 9.54 9.388 9.236 9.084 8.932 8.781 8.63 8.479 8.33 8.181 8.034 7.887 7.742 7.598 7.456 7.315 7.176 7.038 6.902 6.768 6.635 6.504 6.375 6.248 6.123 6.0 5.879 5.759 5.642 5.526 5.413 5.301 5.191 5.083 4.977 4.873 4.771 4.671 4.572 4.476 4.381 4.288 4.197 4.107 4.019 3.933 3.849 3.766 3.685 3.606 3.528 3.452 3.377 3.304 3.232 3.162 3.093 3.026 2.96 2.895 2.832 2.77 2.71 2.65 2.592 2.535 2.48 2.425 2.372 2.32 2.269 2.219 2.17 2.122 2.075 2.03 1.985 1.941 1.898 1.856 1.815 1.775 1.736 1.697 1.66 1.623 1.587 1.552 1.518 1.484

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.671" PeakHeight="110.0" Num="3" Error="0.0">
-28.497 10.36 -1.998
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.671" EndFrequency="12.35" PeakHeight="419.475" Num="5" zHalfNm="325.806" Error="1.556">
-249.291 -48.984 23.842 -4.832 0.196
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="30.406" Depth="0.141"/>
<TopsideChapman PeakHeight="419.475" PeakDensity="1892338.8" PeakScaleHeight="69.341" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
