<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 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" >
2026.02.04 (035) 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">
FF202603502041740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.430" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.719" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="180.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="180.000" 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="7.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" 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="3.137" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.241" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="396.028" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.243" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.365" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="216.579" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.126" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="118.343" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="244.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" 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" >
4.25 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
180.000 180.000 185.000 200.000 210.000 215.000 223.000 231.000 239.000 247.000 255.000 260.000 260.000 265.000 268.500 272.000 275.500 279.000 282.500 286.000 289.500 293.000 296.500 300.000 303.500 307.000 310.500 314.000 317.500 321.000 324.500 328.000 331.500 335.000 340.000 340.000 343.000 346.000 349.000 352.000 355.000 355.000 360.000 360.000 362.500 365.000 367.500 370.000 375.000 377.500 380.000 382.500 385.000 385.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 420.000 420.000 425.000 425.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 470.000 475.000 475.000 480.000 490.000 495.000 500.000 510.000 520.000 530.000 540.000 545.000 555.000 565.000 575.000 585.000 595.000 600.000 610.000 619.078 629.654 642.131 657.073 675.292 697.995 727.073 765.650 819.285
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 57 54 54 54 0 45 0 0 54 51 51 51 0 51 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 45 0 48 45 51 0 0 48 0 48 48 45 51 0 0 0 48 48 0 48 0 48 57 51 45 51 57 54 57 57 60 57 60 51 60 60 60 60 63 66 63 63 66 66 54 54 60 66 66 63 60 60 63 63 63 63 60 60 60 57 57 57 57 57 57 54 57 54 51 51 51 48
</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 1.171875 0.390625 1.171875 1.171875 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -2.734375 0.390625 1.171875 1.953125 1.171875 1.953125 -0.390625 -2.734375 2.734375 -0.390625 2.734375 -2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -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 2.734375 -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 -1.171875 -1.171875 -1.171875 -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" >
89.523 90.0 95.0 100.0 105.0 110.0 112.613 115.0 115.226 117.839 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 396.028 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.109 2.715 3.035 3.137 3.015 3.015 3.015 3.137 3.196 3.339 3.49 3.649 3.813 3.981 4.149 4.317 4.484 4.649 4.81 4.969 5.125 5.277 5.427 5.573 5.717 5.858 5.996 6.133 6.267 6.398 6.528 6.656 6.782 6.906 7.029 7.149 7.268 7.385 7.501 7.614 7.726 7.836 7.944 8.05 8.154 8.255 8.354 8.45 8.543 8.633 8.719 8.802 8.88 8.954 9.023 9.087 9.144 9.196 9.24 9.278 9.308 9.33 9.344 9.35 9.35 9.349 9.345 9.338 9.327 9.314 9.298 9.279 9.258 9.234 9.207 9.179 9.147 9.114 9.078 9.041 9.001 8.96 8.916 8.871 8.825 8.777 8.727 8.676 8.623 8.57 8.515 8.459 8.401 8.343 8.284 8.224 8.163 8.102 8.039 7.976 7.913 7.849 7.784 7.719 7.653 7.587 7.521 7.455 7.388 7.321 7.254 7.187 7.119 7.052 6.984 6.917 6.85 6.782 6.715 6.648 6.581 6.514 6.447 6.381 6.314 6.248 6.182 6.117 6.052 5.987 5.922 5.858 5.794 5.73 5.667 5.604 5.542 5.48 5.419 5.357 5.297 5.236 5.177 5.117 5.058 5.0 4.942 4.884 4.827 4.771 4.715 4.659 4.604 4.55 4.496 4.442 4.389 4.336 4.284 4.233 4.182 4.131 4.081 4.032 3.983 3.934 3.886 3.838 3.791 3.745 3.699 3.653 3.608 3.563 3.519 3.475 3.432 3.39 3.347 3.306 3.264 3.223 3.183 3.143 3.104 3.065

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.137" PeakHeight="110.0" Num="3" Error="0.0">
-30.307 12.867 -3.037
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.137" EndFrequency="9.35" PeakHeight="396.028" Num="5" zHalfNm="233.243" Error="8.157">
-277.616 -10.196 14.442 -4.997 0.178
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.839" Depth="0.122"/>
<TopsideChapman PeakHeight="396.028" PeakDensity="1084646.4" PeakScaleHeight="118.343" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
