<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 21:30:00.000"
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="14.0">
<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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x cusp not found, One of F2 cusps was derived from the other</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" >
2026.10.28 (301) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630110282130009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.335" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.181" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="545.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="545.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="560.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.406" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="474.579" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="384.348" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.861" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="131.825" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.163" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.712" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="131.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="20">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
545.000 550.000 550.000 555.000 555.000 560.000 560.000 570.000 570.000 580.000 585.000 590.000 600.000 605.000 615.000 625.000 635.000 650.688 670.022 694.439
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 54 57 66 72 69 69 63 69 66 72 66 66 69 69 72 69 57 60 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.587 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.223 140.0 145.0 150.0 155.0 160.0 165.0 168.447 170.0 175.0 180.0 185.0 190.0 195.0 197.67 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 474.579 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.268 0.352 0.393 0.406 0.401 0.388 0.363 0.326 0.271 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.246 0.281 0.317 0.352 0.387 0.406 0.431 0.486 0.544 0.607 0.674 0.746 0.825 0.91 1.001 1.1 1.206 1.321 1.443 1.574 1.714 1.862 2.019 2.185 2.359 2.542 2.732 2.93 3.136 3.348 3.567 3.793 4.023 4.259 4.499 4.743 4.99 5.24 5.491 5.744 5.997 6.25 6.501 6.75 6.995 7.236 7.472 7.7 7.921 8.133 8.334 8.523 8.699 8.86 9.006 9.135 9.246 9.337 9.409 9.461 9.491 9.5 9.5 9.494 9.479 9.454 9.421 9.38 9.331 9.274 9.211 9.142 9.067 8.987 8.901 8.811 8.717 8.619 8.518 8.413 8.306 8.196 8.084 7.971 7.856 7.739 7.622 7.503 7.384 7.265 7.145 7.025 6.906 6.786 6.667 6.549 6.431 6.313 6.197 6.081 5.967 5.854 5.741 5.63 5.521 5.412 5.305 5.199 5.095 4.992 4.891 4.791 4.693 4.596 4.501 4.407 4.315 4.224 4.135 4.048 3.962 3.877 3.795 3.713 3.633 3.555 3.478 3.403 3.329 3.257 3.185 3.116 3.048 2.981 2.915 2.851 2.788 2.727 2.666 2.607 2.549 2.493 2.437 2.383 2.33 2.278 2.227 2.177 2.129 2.081 2.034 1.989 1.944 1.9 1.858 1.816 1.775 1.735 1.696 1.658 1.62 1.584 1.548 1.513 1.479 1.445 1.413 1.381

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.406" PeakHeight="110.0" Num="3" Error="0.0">
-20.373 3.189 -0.229
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.406" EndFrequency="9.5" PeakHeight="474.579" Num="5" zHalfNm="384.348" Error="1.838">
-274.956 -4.641 3.556 -1.757 0.889
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.67" Depth="0.206"/>
<TopsideChapman PeakHeight="474.579" PeakDensity="1119727.0" PeakScaleHeight="67.712" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
