<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 19:20:00.000"
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="18.0">
<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" >
2026.01.30 (030) 19:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603001301920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.270" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.039" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.633" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="424.124" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.251" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.216" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="201.296" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.567" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="107.124" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="226.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.630" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 240.000 240.000 240.000 243.750 247.500 251.250 255.000 255.000 258.333 261.667 265.000 265.000 270.000 275.000 275.000 280.000 282.500 285.000 287.500 290.000 292.000 294.000 296.000 298.000 300.000 300.000 302.500 305.000 307.500 310.000 311.429 312.857 314.286 315.714 317.143 318.571 320.000 320.000 323.750 327.500 331.250 335.000 335.000 337.500 340.000 342.500 345.000 347.500 350.000 352.500 355.000 360.000 360.000 365.000 365.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 425.000 430.000 435.000 435.000 440.000 440.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 495.000 505.000 505.000 510.000 515.000 520.000 525.000 530.000 530.000 530.000 535.000 540.000 545.000 550.000 555.000 555.000 560.000 565.000 570.000 575.000 575.000 580.000 590.000 595.000 600.000 610.000 617.500 625.000 634.935 646.092 658.713 673.106 689.671 708.941 731.638 758.765 791.757
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 54 54 51 45 0 0 0 45 57 0 0 51 45 0 48 54 45 0 0 0 45 0 0 0 0 51 0 0 0 0 54 0 51 0 0 0 0 51 0 0 0 0 57 63 0 0 0 0 0 63 0 63 60 66 63 63 66 60 66 0 54 63 60 66 63 57 66 60 66 63 60 66 66 63 66 66 63 66 66 66 63 60 66 66 66 63 63 66 66 66 66 66 66 63 63 63 66 66 66 63 66 66 63 63 66 63 57 60 60 60 57 57 57 57 57 57 57 57 0 54 54 51 48 51 48 45 48 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 2.734375 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 1.953125 -1.171875 -0.390625 0.390625 -1.953125 -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 -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 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 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" >
89.613 90.0 95.0 100.0 105.0 110.0 114.93 115.0 119.861 120.0 124.791 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 424.124 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.768 2.279 2.548 2.633 2.51 2.51 2.51 2.513 2.633 2.638 2.753 2.871 2.993 3.12 3.252 3.39 3.534 3.685 3.841 4.003 4.17 4.341 4.514 4.689 4.863 5.037 5.209 5.379 5.546 5.711 5.872 6.03 6.186 6.338 6.487 6.634 6.779 6.921 7.06 7.198 7.333 7.466 7.598 7.728 7.856 7.983 8.108 8.232 8.354 8.475 8.594 8.712 8.828 8.942 9.055 9.165 9.273 9.378 9.481 9.579 9.673 9.763 9.846 9.922 9.989 10.046 10.092 10.126 10.145 10.15 10.15 10.147 10.14 10.129 10.114 10.095 10.073 10.047 10.017 9.985 9.949 9.91 9.869 9.824 9.777 9.728 9.676 9.622 9.565 9.507 9.446 9.384 9.32 9.255 9.188 9.119 9.049 8.978 8.906 8.833 8.758 8.683 8.607 8.53 8.453 8.375 8.296 8.217 8.137 8.058 7.977 7.897 7.816 7.736 7.655 7.574 7.493 7.412 7.331 7.251 7.17 7.09 7.01 6.93 6.851 6.771 6.693 6.614 6.536 6.458 6.381 6.304 6.228 6.152 6.077 6.002 5.928 5.854 5.781 5.709 5.637 5.566 5.495 5.425 5.355 5.287 5.218 5.151 5.084 5.018 4.952 4.887 4.823 4.759 4.696 4.634 4.572 4.512 4.451 4.392 4.333 4.274 4.217 4.16 4.103 4.048 3.993 3.938 3.884 3.831 3.779 3.727 3.676 3.625 3.575 3.526 3.477 3.429 3.382 3.335 3.288 3.243 3.197 3.153 3.109 3.065

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.633" PeakHeight="110.0" Num="3" Error="0.0">
-29.854 12.21 -2.743
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.633" EndFrequency="10.15" PeakHeight="424.124" Num="5" zHalfNm="274.251" Error="4.825">
-283.693 -29.483 23.624 -12.656 2.875
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.791" Depth="0.123"/>
<TopsideChapman PeakHeight="424.124" PeakDensity="1278194.8" PeakScaleHeight="107.124" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
