<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 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="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" >
2026.01.29 (029) 16:00:00</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">
FF202602901291600009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.234" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.896" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="205.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="595.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.343" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.338" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="413.521" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.836" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.590" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="194.846" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.316" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="107.260" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="249.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="112">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.2 10.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 215.000 220.000 220.000 231.000 242.000 253.000 264.000 275.000 280.000 285.000 290.000 295.000 300.000 305.000 305.000 310.000 312.500 315.000 320.000 322.500 325.000 325.000 330.000 335.000 335.000 340.000 345.000 347.500 350.000 355.000 358.333 361.667 365.000 365.000 368.333 371.667 375.000 378.333 381.667 385.000 390.000 390.000 395.000 395.000 405.000 405.000 410.000 415.000 415.000 420.000 422.500 425.000 425.000 430.000 435.000 435.000 440.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 497.500 500.000 505.000 510.000 515.000 520.000 525.000 530.000 535.000 540.000 540.000 545.000 550.000 555.000 560.000 560.000 565.000 570.000 570.000 575.000 580.000 585.000 590.000 592.500 595.000 605.000 605.000 615.000 620.000 626.974 634.543 642.787 651.800 661.695 672.609 684.707 698.193 713.319 730.407 749.861
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 45 51 51 0 0 0 45 48 0 0 0 0 45 48 48 0 48 48 0 51 0 60 54 0 63 63 0 57 63 0 0 45 54 0 0 0 54 0 51 51 54 57 57 57 60 54 54 60 51 0 51 51 0 57 54 0 60 57 63 63 63 60 66 66 63 63 66 63 57 57 0 60 54 51 57 54 51 54 57 48 51 51 51 57 57 63 66 63 63 63 60 51 54 0 45 42 48 54 51 48 54 51 48 45 45 45 42 0 0 0
</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 2.734375 -1.171875 -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 -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 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 -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 -2.734375 -0.390625 -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" >
89.49 90.0 95.0 100.0 105.0 110.0 111.743 113.487 115.0 115.23 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 413.521 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.249 2.893 3.234 3.343 3.22 3.22 3.327 3.343 3.449 3.567 3.693 3.827 3.968 4.114 4.265 4.418 4.573 4.727 4.88 5.032 5.181 5.328 5.472 5.613 5.752 5.888 6.021 6.153 6.282 6.408 6.533 6.657 6.778 6.899 7.017 7.135 7.252 7.367 7.482 7.595 7.708 7.821 7.933 8.044 8.155 8.265 8.375 8.485 8.594 8.703 8.812 8.92 9.029 9.136 9.244 9.35 9.456 9.56 9.663 9.763 9.859 9.95 10.035 10.11 10.172 10.218 10.244 10.25 10.25 10.246 10.239 10.227 10.212 10.192 10.169 10.143 10.113 10.079 10.043 10.004 9.961 9.916 9.869 9.818 9.766 9.711 9.654 9.595 9.534 9.471 9.406 9.34 9.272 9.203 9.132 9.06 8.987 8.913 8.838 8.762 8.686 8.608 8.53 8.451 8.372 8.292 8.212 8.131 8.05 7.969 7.888 7.806 7.725 7.643 7.562 7.48 7.399 7.317 7.236 7.155 7.075 6.994 6.914 6.834 6.755 6.675 6.597 6.518 6.441 6.363 6.286 6.21 6.134 6.059 5.984 5.91 5.836 5.763 5.69 5.618 5.547 5.476 5.406 5.337 5.268 5.2 5.133 5.066 5.0 4.934 4.869 4.805 4.742 4.679 4.617 4.555 4.495 4.434 4.375 4.316 4.258 4.2 4.144 4.088 4.032 3.977 3.923 3.869 3.816 3.764 3.713 3.661 3.611 3.561 3.512 3.464 3.416 3.368 3.322 3.275 3.23 3.185 3.141 3.097 3.053 3.011

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.343" PeakHeight="110.0" Num="3" Error="0.0">
-30.467 13.101 -3.144
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.343" EndFrequency="10.25" PeakHeight="413.521" Num="5" zHalfNm="259.836" Error="6.112">
-263.632 -57.809 33.904 -11.603 0.849
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.23" Depth="0.123"/>
<TopsideChapman PeakHeight="413.521" PeakDensity="1303505.0" PeakScaleHeight="107.26" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
