<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 19:00:00.000"
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="12.0">
<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: 50% PACIFIC flags: F2o cusp not found, 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" >
2026.10.20 (293) 19:00:00</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">
FF202629310201900009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.459" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.465" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="504.714" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="504.714" 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="9.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="512.176" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.584" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="378.888" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="252.141" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.385" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="173.590" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.908" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.669" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="186.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.860" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
504.714 508.279 512.176 516.454 521.172 525.000 530.000 540.000 545.000 555.000 565.000 575.000 590.000 605.000 625.000 645.000 675.000 715.509
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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" >
1.953125 2.734375 1.171875 -1.953125 1.953125 -1.171875 1.953125 -1.171875 -0.390625 -0.390625 -1.171875 2.734375 1.171875 -1.171875 1.171875 -2.734375 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" >
89.622 90.0 95.0 100.0 105.0 110.0 115.0 115.164 120.0 120.329 125.0 125.493 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.888 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.735 2.237 2.5 2.584 2.468 2.46 2.46 2.46 2.572 2.584 2.715 2.859 3.005 3.153 3.305 3.461 3.622 3.787 3.958 4.133 4.312 4.496 4.683 4.872 5.064 5.256 5.45 5.643 5.836 6.027 6.218 6.406 6.593 6.777 6.959 7.138 7.314 7.487 7.657 7.824 7.988 8.148 8.303 8.455 8.603 8.745 8.883 9.015 9.141 9.261 9.373 9.477 9.573 9.66 9.736 9.802 9.857 9.899 9.929 9.946 9.95 9.95 9.946 9.937 9.922 9.903 9.879 9.85 9.817 9.78 9.739 9.694 9.646 9.594 9.539 9.48 9.419 9.355 9.289 9.22 9.149 9.075 9.0 8.923 8.844 8.764 8.682 8.599 8.515 8.43 8.344 8.257 8.169 8.08 7.991 7.902 7.812 7.722 7.631 7.541 7.45 7.359 7.269 7.178 7.088 6.997 6.908 6.818 6.729 6.64 6.552 6.464 6.376 6.29 6.203 6.118 6.033 5.948 5.865 5.782 5.699 5.618 5.537 5.457 5.378 5.299 5.222 5.145 5.069 4.994 4.92 4.846 4.773 4.702 4.631 4.561 4.491 4.423 4.355 4.289 4.223 4.158 4.094 4.03 3.968 3.906 3.845 3.785 3.726 3.668 3.61 3.553 3.497 3.442 3.388 3.334 3.282 3.229 3.178 3.128 3.078 3.029 2.98 2.933 2.886 2.839 2.794 2.749 2.705 2.661 2.618 2.576 2.535 2.494 2.453 2.414 2.375 2.336 2.298 2.261 2.224 2.188 2.153 2.118 2.083 2.049

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.584" PeakHeight="110.0" Num="3" Error="0.0">
-29.804 12.138 -2.712
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.584" EndFrequency="9.95" PeakHeight="378.888" Num="5" zHalfNm="252.141" Error="2.593">
-247.232 -10.525 6.791 -3.72 1.291
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.493" Depth="0.124"/>
<TopsideChapman PeakHeight="378.888" PeakDensity="1228318.9" PeakScaleHeight="93.669" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
