<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 05:20:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 05:20:00</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">
FF202602901290520009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.944" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.759" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="380.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="371.534" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.786" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.574" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="103.189" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.733" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.636" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.9 3.95 4.0 4.05 4.1 4.15 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 315.000 317.500 320.000 322.500 325.000 322.500 320.000 320.000 320.000 320.000 320.000 319.853 319.706 319.559 319.412 319.265 319.118 318.971 318.824 318.676 318.529 318.382 318.235 318.088 317.941 317.794 317.647 317.500 317.353 317.206 317.059 316.912 316.765 316.618 316.471 316.324 316.176 316.029 315.882 315.735 315.588 315.441 315.294 315.147 315.000 315.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 331.667 333.333 335.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 371.667 373.333 375.000 380.000 380.000 380.000 380.000 385.000 388.511 392.649 397.601 403.632 411.137 420.733 433.435 451.042 477.073 519.478 600.793 819.976
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 57 54 57 57 69 60 66 60 60 63 66 0 0 0 0 0 0 54 51 0 0 0 0 0 57 0 0 0 0 0 0 54 0 0 0 0 66 75 69 0 69 0 0 0 69 72 75 72 66 72 72 78 72 72 72 69 66 69 0 66 57 66 69 75 72 72 66 69 69 66 66 69 63 0 66 69 66 66 69 72 66 69 63 72 69 75 69 72 66 72 75 0 0 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -2.734375 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -0.390625 -1.171875 -1.953125 2.734375 -2.734375 -1.953125 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 -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 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 -1.953125 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.483 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.967 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.45 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.534 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.292 0.26 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.23 0.251 0.272 0.293 0.314 0.335 0.354 0.359 0.408 0.472 0.551 0.649 0.767 0.908 1.074 1.274 1.519 1.834 2.262 2.905 3.924 5.039 5.844 6.422 6.866 7.221 7.514 7.758 7.965 8.14 8.288 8.412 8.514 8.596 8.66 8.707 8.736 8.749 8.75 8.747 8.732 8.704 8.665 8.616 8.557 8.489 8.413 8.329 8.238 8.141 8.038 7.93 7.818 7.702 7.582 7.459 7.334 7.207 7.079 6.949 6.818 6.686 6.554 6.422 6.291 6.159 6.029 5.899 5.77 5.643 5.516 5.391 5.268 5.146 5.026 4.907 4.791 4.676 4.563 4.452 4.344 4.237 4.132 4.029 3.929 3.83 3.733 3.639 3.546 3.456 3.367 3.281 3.196 3.113 3.033 2.954 2.877 2.802 2.728 2.657 2.587 2.519 2.452 2.387 2.324 2.263 2.202 2.144 2.087 2.031 1.977 1.924 1.873 1.823 1.774 1.726 1.68 1.635 1.591 1.548 1.506 1.466 1.426 1.388 1.351 1.314 1.279 1.244 1.21 1.178 1.146 1.115 1.085 1.055 1.027 0.999 0.972 0.946 0.92 0.895 0.871 0.847 0.824 0.802 0.78 0.759 0.738 0.718 0.699 0.68 0.661 0.643 0.626 0.609 0.592 0.576 0.561 0.545 0.531 0.516 0.502 0.488 0.475 0.462 0.45

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.75" PeakHeight="371.534" Num="5" zHalfNm="297.786" Error="5.511">
-180.408 56.607 -38.973 14.334 -3.644
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.45" Depth="0.154"/>
<TopsideChapman PeakHeight="371.534" PeakDensity="949906.94" PeakScaleHeight="56.636" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
