<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 17:40:00.000"
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" >
2026.02.05 (036) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603602051740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.612" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.251" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" 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="3.139" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.242" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="341.442" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.292" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.365" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.639" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.592" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.648" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="164.900" 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" >
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" >
275.000 280.000 280.000 283.462 286.923 290.385 293.846 297.308 300.769 304.231 307.692 311.154 314.615 318.077 321.538 325.000 330.000 332.500 335.000 337.500 340.000 340.000 340.000 345.000 346.500 348.000 349.500 351.000 352.500 354.000 355.500 357.000 358.500 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 376.667 378.333 380.000 381.667 383.333 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 402.500 405.000 407.500 410.000 410.000 415.000 417.500 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 520.000 526.358 533.689
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 45 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 51 51 48 51 0 0 0 0 0 0 0 45 0 45 0 51 54 54 63 63 60 57 60 57 54 54 54 0 0 0 0 0 60 60 60 60 60 54 57 54 51 48 45 0 45 0 45 48 51 0 54 51 54 51 57 54 54 54 51 48 57 51 54 54 48 48 51 51 51 51 48 45 0 45 51 54 51 51 51 48 45 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 2.734375 1.953125 1.171875 -1.171875 1.171875 2.734375 -1.171875 -2.734375 1.953125 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 2.734375 -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 1.953125 0.390625 1.171875 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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -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" >
89.522 90.0 95.0 100.0 105.0 110.0 112.607 115.0 115.213 117.82 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 341.442 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.111 2.717 3.037 3.139 3.017 3.017 3.017 3.139 3.221 3.387 3.539 3.684 3.824 3.963 4.1 4.238 4.376 4.516 4.656 4.799 4.943 5.089 5.236 5.386 5.537 5.69 5.844 6.0 6.158 6.317 6.477 6.639 6.801 6.965 7.13 7.296 7.463 7.631 7.8 7.971 8.143 8.316 8.49 8.666 8.843 9.02 9.199 9.376 9.551 9.718 9.869 9.986 10.047 10.05 10.047 10.034 10.01 9.976 9.933 9.881 9.821 9.754 9.679 9.598 9.51 9.417 9.319 9.216 9.108 8.997 8.883 8.766 8.645 8.523 8.399 8.272 8.145 8.016 7.887 7.757 7.626 7.496 7.365 7.234 7.104 6.975 6.846 6.718 6.59 6.464 6.339 6.215 6.092 5.971 5.851 5.732 5.615 5.5 5.386 5.274 5.164 5.055 4.948 4.843 4.739 4.637 4.537 4.439 4.342 4.247 4.154 4.063 3.973 3.885 3.799 3.715 3.632 3.55 3.471 3.393 3.316 3.242 3.168 3.096 3.026 2.957 2.89 2.824 2.76 2.696 2.635 2.574 2.515 2.457 2.401 2.346 2.291 2.239 2.187 2.136 2.087 2.039 1.991 1.945 1.9 1.856 1.813 1.771 1.729 1.689 1.65 1.611 1.574 1.537 1.501 1.466 1.432 1.399 1.366 1.334 1.303 1.272 1.243 1.214 1.185 1.157 1.13 1.104 1.078 1.053 1.028 1.004 0.981 0.958 0.935 0.913 0.892 0.871 0.85 0.83 0.811 0.792 0.773 0.755 0.737 0.72

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.139" PeakHeight="110.0" Num="3" Error="0.0">
-30.309 12.869 -3.038
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.139" EndFrequency="10.05" PeakHeight="341.442" Num="5" zHalfNm="249.292" Error="4.141">
-177.03 -65.236 21.021 -4.103 1.726
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.82" Depth="0.122"/>
<TopsideChapman PeakHeight="341.442" PeakDensity="1253132.8" PeakScaleHeight="65.648" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
