<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 20:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 20:50:00</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">
FF202630410312050009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.575" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.131" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="517.008" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.006" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.888" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="306.268" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.248" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="111.167" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.110" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.098" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="116.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="66">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 433.000 436.000 439.000 442.000 445.000 447.500 450.000 455.000 457.500 460.000 461.667 463.333 465.000 467.500 470.000 475.000 475.000 480.000 480.000 485.000 485.000 485.000 485.000 487.500 490.000 495.000 495.000 495.000 495.000 500.000 501.567 503.331 505.332 507.621 510.265 513.353 517.008 521.401 526.781 533.523 542.220 553.864 570.261
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 51 63 0 60 66 66 69 66 66 60 0 60 51 57 63 63 57 63 57 63 57 60 0 0 0 0 57 0 60 60 0 60 0 0 63 0 63 60 63 0 0 54 0 0 63 0 45 48 0 60 0 54 0 0 54 0 48 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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 -1.953125 -0.390625 1.953125 -0.390625 -1.953125 -0.390625 2.734375 1.171875 -1.171875 1.953125
</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" >
90.264 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.819 130.0 135.0 140.0 143.637 145.0 150.0 155.0 160.0 160.456 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.888 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.67 0.872 0.974 1.006 0.989 0.937 0.844 0.797 0.797 0.797 0.797 0.797 0.814 0.876 0.938 1.0 1.006 1.141 1.275 1.407 1.545 1.69 1.847 2.017 2.202 2.404 2.624 2.861 3.115 3.385 3.666 3.957 4.255 4.558 4.863 5.169 5.476 5.782 6.088 6.393 6.696 6.999 7.3 7.601 7.9 8.198 8.494 8.789 9.082 9.371 9.657 9.939 10.213 10.479 10.732 10.969 11.185 11.372 11.524 11.632 11.691 11.7 11.698 11.682 11.649 11.601 11.537 11.461 11.371 11.27 11.159 11.038 10.908 10.771 10.626 10.475 10.319 10.158 9.993 9.825 9.653 9.48 9.304 9.128 8.95 8.772 8.594 8.416 8.239 8.063 7.888 7.714 7.541 7.371 7.202 7.036 6.871 6.709 6.549 6.392 6.238 6.086 5.936 5.79 5.646 5.505 5.367 5.231 5.098 4.968 4.841 4.717 4.595 4.476 4.36 4.247 4.136 4.027 3.922 3.818 3.717 3.619 3.523 3.43 3.338 3.249 3.163 3.078 2.996 2.915 2.837 2.761 2.686 2.614 2.544 2.475 2.408 2.343 2.279 2.218 2.158 2.099 2.042 1.986 1.932 1.88 1.829 1.779 1.73 1.683 1.637 1.593 1.549 1.507 1.466 1.426 1.387 1.349 1.312 1.276 1.241 1.207 1.174 1.142 1.111 1.08 1.051 1.022 0.994 0.967 0.94 0.915 0.89 0.865 0.841 0.818 0.796 0.774 0.753 0.732 0.712 0.693 0.674 0.655 0.637 0.62

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.006" PeakHeight="110.0" Num="3" Error="0.0">
-26.532 8.025 -1.229
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.006" EndFrequency="11.7" PeakHeight="382.888" Num="5" zHalfNm="306.268" Error="4.004">
-210.613 -21.955 15.131 -8.631 3.636
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.456" Depth="0.209"/>
<TopsideChapman PeakHeight="382.888" PeakDensity="1698387.1" PeakScaleHeight="56.098" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
