<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 21:00:00.000"
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) 21:00:00</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">
FF202630110282100009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.465" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.266" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="460.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="460.000" 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="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="541.667" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.805" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="415.884" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="333.339" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.166" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="119.785" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.172" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.241" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="123.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.820" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="36">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 520.000 525.000 528.333 531.667 535.000 538.333 541.667 545.000 550.000 556.466 564.194 573.594 585.274 600.176 619.850
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 57 0 0 48 0 69 72 69 0 0 63 60 69 69 66 63 63 69 72 0 0 0 0 0 0 0 57 57 57 57 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -0.390625 2.734375 -2.734375 1.953125 -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" >
90.537 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.832 135.0 140.0 145.0 150.0 155.0 155.664 160.0 165.0 170.0 175.0 178.496 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.884 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.535 0.698 0.779 0.805 0.792 0.753 0.683 0.572 0.478 0.478 0.478 0.478 0.478 0.478 0.478 0.54 0.612 0.683 0.755 0.805 0.839 0.947 1.052 1.16 1.273 1.392 1.52 1.657 1.805 1.964 2.135 2.318 2.512 2.719 2.935 3.162 3.397 3.64 3.888 4.142 4.4 4.662 4.926 5.192 5.459 5.728 5.997 6.266 6.535 6.804 7.071 7.336 7.598 7.858 8.113 8.364 8.607 8.843 9.069 9.284 9.484 9.667 9.83 9.971 10.086 10.172 10.227 10.249 10.25 10.246 10.229 10.199 10.159 10.108 10.047 9.976 9.897 9.81 9.716 9.615 9.508 9.395 9.278 9.156 9.03 8.901 8.769 8.634 8.497 8.358 8.218 8.076 7.934 7.792 7.649 7.506 7.363 7.221 7.08 6.939 6.799 6.66 6.523 6.387 6.252 6.119 5.988 5.858 5.73 5.604 5.48 5.357 5.237 5.119 5.002 4.888 4.776 4.666 4.557 4.451 4.347 4.245 4.145 4.047 3.951 3.857 3.765 3.675 3.587 3.501 3.416 3.334 3.253 3.174 3.097 3.022 2.948 2.876 2.806 2.737 2.67 2.604 2.54 2.478 2.416 2.357 2.299 2.242 2.186 2.132 2.079 2.028 1.977 1.928 1.88 1.833 1.788 1.743 1.7 1.657 1.616 1.576 1.536 1.498 1.46 1.424 1.388 1.353 1.32 1.287 1.254 1.223 1.192 1.162 1.133 1.105 1.077 1.05 1.024 0.998 0.973 0.949 0.925 0.901 0.879 0.857

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.805" PeakHeight="110.0" Num="3" Error="0.0">
-25.441 6.907 -0.929
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.805" EndFrequency="10.25" PeakHeight="415.884" Num="5" zHalfNm="333.339" Error="3.247">
-229.411 -14.817 9.551 -5.058 2.347
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="68.496" Depth="0.327"/>
<TopsideChapman PeakHeight="415.884" PeakDensity="1303505.0" PeakScaleHeight="61.241" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
