<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 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="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) 19:00:00</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">
FF202603001301900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.255" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.658" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="590.000" 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="2.762" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="420.919" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.683" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.282" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="198.825" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.026" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="106.029" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="229.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.540" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 255.000 260.000 263.333 266.667 270.000 270.000 272.500 275.000 275.000 280.000 285.000 287.500 290.000 290.000 293.333 296.667 300.000 301.667 303.333 305.000 305.000 315.000 317.500 320.000 322.500 325.000 330.000 330.000 330.000 330.000 330.000 340.000 340.000 342.500 345.000 350.000 353.333 356.667 360.000 360.000 360.000 360.000 365.000 365.000 370.000 375.000 375.000 380.000 380.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 425.000 430.000 435.000 435.000 440.000 445.000 445.000 445.000 450.000 460.000 460.000 465.000 470.000 475.000 475.000 480.000 485.000 490.000 505.000 505.000 510.000 515.000 525.000 525.000 530.000 530.000 540.000 545.000 545.000 550.000 550.000 560.000 560.000 565.000 570.000 570.000 575.000 580.000 585.000 590.000 590.000 600.000 605.000 615.000 620.000 628.333 636.667 645.000 657.500 670.000 684.748 701.710 721.423 744.616 772.299
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 54 54 0 0 45 54 0 54 0 54 51 0 54 54 0 0 57 0 0 57 0 51 0 54 0 54 45 0 60 60 0 57 63 0 63 54 0 0 48 57 63 60 63 63 63 60 63 60 63 66 60 66 63 60 66 63 63 66 63 63 66 66 60 57 66 63 60 66 66 63 63 66 66 66 66 66 66 66 66 54 66 63 63 54 63 63 63 63 63 63 66 66 60 66 57 63 60 48 63 63 60 60 57 57 57 57 57 0 51 51 51 51 48 48 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 2.734375 -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 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
</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" >
89.588 90.0 95.0 100.0 105.0 110.0 114.309 115.0 118.617 120.0 122.926 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 420.919 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.856 2.391 2.672 2.762 2.64 2.64 2.64 2.679 2.762 2.807 2.917 3.031 3.15 3.274 3.404 3.54 3.683 3.832 3.988 4.149 4.315 4.484 4.655 4.827 4.998 5.167 5.334 5.497 5.658 5.815 5.968 6.119 6.266 6.41 6.551 6.689 6.824 6.958 7.089 7.218 7.345 7.47 7.593 7.715 7.836 7.955 8.073 8.19 8.305 8.42 8.533 8.645 8.756 8.866 8.974 9.082 9.187 9.29 9.392 9.49 9.585 9.675 9.76 9.838 9.906 9.964 10.008 10.038 10.05 10.05 10.049 10.043 10.033 10.019 10.002 9.98 9.956 9.927 9.895 9.86 9.822 9.781 9.738 9.691 9.642 9.591 9.537 9.481 9.423 9.363 9.301 9.237 9.172 9.105 9.036 8.967 8.896 8.823 8.75 8.676 8.601 8.525 8.448 8.37 8.292 8.213 8.134 8.055 7.975 7.895 7.814 7.733 7.653 7.572 7.491 7.41 7.329 7.248 7.168 7.087 7.007 6.927 6.847 6.768 6.688 6.61 6.531 6.453 6.376 6.299 6.222 6.146 6.07 5.995 5.92 5.846 5.773 5.7 5.628 5.556 5.485 5.414 5.344 5.275 5.207 5.139 5.071 5.005 4.939 4.873 4.809 4.745 4.681 4.619 4.557 4.496 4.435 4.375 4.316 4.257 4.199 4.142 4.085 4.029 3.974 3.919 3.865 3.812 3.759 3.707 3.656 3.605 3.555 3.505 3.456 3.408 3.36 3.313 3.267 3.221 3.175 3.131 3.087 3.043 3.0 2.958

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.762" PeakHeight="110.0" Num="3" Error="0.0">
-29.982 12.393 -2.823
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.762" EndFrequency="10.05" PeakHeight="420.919" Num="5" zHalfNm="270.683" Error="4.36">
-275.917 -38.733 28.343 -14.888 3.202
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.926" Depth="0.122"/>
<TopsideChapman PeakHeight="420.919" PeakDensity="1253132.8" PeakScaleHeight="106.029" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
