<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 16:00:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.31 (304) 16:00:00</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">
FF202630410311600009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.682" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.175" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.319" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.327" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="336.483" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.189" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.328" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="149.544" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.705" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.535" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="172.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="58">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 366.667 368.333 370.000 371.667 373.333 375.000 376.667 378.333 380.000 385.000 385.000 386.250 387.500 388.750 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 425.000 430.000 435.000 435.000 440.000 445.000 450.000 455.000 459.251 463.851 468.844 474.282 480.227 486.756 493.956 501.939 510.839 520.822 532.102 544.945 559.704 576.840 596.978 620.983
</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 48 0 63 66 54 60 63 54 57 48 54 57 54 57 54 54 54 48 48 54 57 54 54 54 48 51 0 45 0 0 0 0 0 0 0 0 0 0 0 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 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 0.390625 -1.171875 0.390625 -2.734375 -0.390625 2.734375 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" >
89.494 90.0 95.0 100.0 105.0 110.0 111.845 113.689 115.0 115.534 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 336.483 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.233 2.872 3.211 3.319 3.196 3.196 3.283 3.319 3.48 3.669 3.865 4.069 4.279 4.495 4.715 4.939 5.165 5.391 5.618 5.843 6.068 6.29 6.511 6.729 6.945 7.158 7.369 7.578 7.784 7.988 8.189 8.388 8.585 8.78 8.971 9.161 9.347 9.53 9.71 9.886 10.057 10.223 10.382 10.534 10.677 10.81 10.929 11.033 11.119 11.185 11.229 11.249 11.25 11.248 11.238 11.221 11.196 11.164 11.126 11.081 11.029 10.973 10.91 10.843 10.771 10.694 10.613 10.528 10.439 10.347 10.252 10.153 10.052 9.949 9.844 9.736 9.627 9.516 9.404 9.29 9.176 9.06 8.944 8.827 8.71 8.593 8.475 8.357 8.239 8.122 8.004 7.887 7.771 7.654 7.539 7.424 7.31 7.196 7.084 6.972 6.861 6.751 6.642 6.535 6.428 6.322 6.218 6.114 6.012 5.911 5.811 5.713 5.615 5.519 5.425 5.331 5.239 5.148 5.058 4.969 4.882 4.796 4.712 4.628 4.546 4.465 4.385 4.307 4.23 4.154 4.079 4.005 3.933 3.862 3.792 3.723 3.655 3.588 3.523 3.458 3.395 3.333 3.272 3.211 3.152 3.094 3.037 2.981 2.926 2.872 2.818 2.766 2.715 2.664 2.615 2.566 2.518 2.472 2.425 2.38 2.336 2.292 2.249 2.207 2.166 2.125 2.085 2.046 2.008 1.97 1.933 1.897 1.861 1.826 1.792 1.758 1.725 1.693 1.661 1.63 1.599 1.569 1.539 1.51 1.482 1.454

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.319" PeakHeight="110.0" Num="3" Error="0.0">
-30.449 13.075 -3.132
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.319" EndFrequency="11.25" PeakHeight="336.483" Num="5" zHalfNm="224.189" Error="2.112">
-207.41 -22.647 13.227 -4.816 0.697
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.534" Depth="0.123"/>
<TopsideChapman PeakHeight="336.483" PeakDensity="1570254.4" PeakScaleHeight="81.535" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
