<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-28 -028 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" >
2026.01.28 (028) 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">
FF202602801281600009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.523" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.113" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" 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="3.342" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.338" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="354.472" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.050" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.590" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.127" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.403" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.988" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="181.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.3 10.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 285.000 290.000 290.000 294.375 298.750 303.125 307.500 311.875 316.250 320.625 325.000 330.000 335.000 340.000 342.500 345.000 347.500 350.000 352.500 355.000 357.500 360.000 362.500 365.000 367.500 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 407.500 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 490.000 490.000 495.000 500.000 505.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 540.000 545.000 550.000 557.668 567.163
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 45 45 0 51 0 54 0 51 0 51 51 51 48 0 0 0 48 0 45 0 51 0 54 0 51 57 57 54 54 54 57 57 57 54 54 57 57 54 57 57 57 57 54 60 57 57 60 57 60 63 57 60 0 57 57 51 54 57 57 60 57 60 60 63 60 51 60 54 60 54 48 60 57 60 60 57 60 60 57 60 57 57 57 57 54 48 57 51 54 54 51 54 54 51 51 51 48 48 45 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 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 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 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" >
89.491 90.0 95.0 100.0 105.0 110.0 111.75 113.499 115.0 115.249 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 354.472 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.248 2.892 3.233 3.342 3.219 3.219 3.324 3.342 3.508 3.663 3.809 3.949 4.086 4.221 4.355 4.489 4.623 4.758 4.894 5.031 5.169 5.308 5.449 5.591 5.734 5.878 6.024 6.171 6.318 6.467 6.617 6.767 6.919 7.071 7.225 7.379 7.534 7.689 7.846 8.004 8.162 8.322 8.483 8.645 8.808 8.972 9.137 9.303 9.47 9.636 9.8 9.959 10.108 10.235 10.322 10.35 10.35 10.344 10.329 10.305 10.273 10.232 10.185 10.13 10.068 10.0 9.926 9.847 9.763 9.674 9.581 9.484 9.383 9.279 9.172 9.062 8.95 8.836 8.72 8.603 8.484 8.364 8.243 8.121 7.999 7.877 7.754 7.631 7.509 7.386 7.264 7.143 7.022 6.902 6.782 6.663 6.546 6.429 6.314 6.199 6.086 5.974 5.863 5.754 5.646 5.539 5.434 5.33 5.228 5.127 5.027 4.929 4.833 4.738 4.644 4.552 4.462 4.373 4.286 4.2 4.115 4.032 3.95 3.87 3.791 3.714 3.638 3.564 3.491 3.419 3.348 3.279 3.212 3.145 3.08 3.016 2.953 2.892 2.831 2.772 2.714 2.657 2.602 2.547 2.494 2.441 2.39 2.34 2.29 2.242 2.195 2.148 2.103 2.058 2.015 1.972 1.93 1.889 1.849 1.81 1.772 1.734 1.697 1.661 1.626 1.591 1.557 1.524 1.492 1.46 1.429 1.398 1.368 1.339 1.311 1.283 1.255 1.228 1.202 1.177 1.151 1.127 1.103 1.079 1.056 1.033

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.342" PeakHeight="110.0" Num="3" Error="0.0">
-30.466 13.1 -3.143
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.342" EndFrequency="10.35" PeakHeight="354.472" Num="5" zHalfNm="253.05" Error="4.197">
-189.805 -69.84 23.153 -4.441 1.71
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.249" Depth="0.123"/>
<TopsideChapman PeakHeight="354.472" PeakDensity="1329063.2" PeakScaleHeight="71.988" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
