<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 18:20:00.000"
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 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) 18:20:00</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">
FF202602901291820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.259" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.039" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.970" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.159" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="427.499" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.131" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.318" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="194.570" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.219" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="106.482" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="233.720" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" 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" >
4.65 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 270.000 272.500 275.000 280.000 282.500 285.000 285.000 290.000 293.333 296.667 300.000 305.000 310.000 312.500 315.000 320.000 325.000 325.000 330.000 335.000 335.000 342.500 350.000 355.000 357.500 360.000 360.000 365.000 370.000 375.000 380.000 385.000 386.667 388.333 390.000 395.000 400.000 400.000 400.000 405.000 405.000 415.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 475.000 475.000 475.000 485.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 530.000 540.000 540.000 545.000 550.000 555.000 555.000 560.000 565.000 565.000 570.000 575.000 575.000 585.000 589.412 594.231 599.517 605.342 611.791 618.972 627.015 636.087 646.397 658.219 671.912 687.956 707.015 730.027 758.364 794.115
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 0 54 48 0 45 48 54 0 0 51 51 48 0 51 54 51 54 57 60 0 0 54 45 0 54 57 0 0 51 51 57 0 0 48 0 60 66 69 66 66 45 60 54 63 69 66 51 60 51 57 54 63 51 57 54 60 63 63 54 51 60 69 72 60 69 75 72 72 66 63 60 66 60 54 51 51 57 60 57 63 66 63 60 60 63 60 63 57 51 51 57 54 54 57 54 54 54 51 51 0 51 54 57 54 54 51 54 48 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.953125 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -2.734375 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 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 -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 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
</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" >
89.55 90.0 95.0 100.0 105.0 110.0 113.352 115.0 116.703 120.0 120.055 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 427.499 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.996 2.571 2.873 2.97 2.848 2.848 2.848 2.968 2.97 3.077 3.19 3.308 3.429 3.553 3.681 3.812 3.945 4.08 4.217 4.355 4.494 4.634 4.773 4.913 5.053 5.192 5.331 5.469 5.607 5.744 5.881 6.017 6.152 6.286 6.42 6.553 6.685 6.817 6.948 7.079 7.209 7.339 7.467 7.596 7.724 7.851 7.978 8.104 8.229 8.354 8.478 8.601 8.723 8.844 8.963 9.081 9.197 9.31 9.421 9.528 9.632 9.73 9.823 9.908 9.985 10.053 10.109 10.153 10.183 10.198 10.2 10.199 10.195 10.187 10.174 10.158 10.137 10.113 10.086 10.055 10.021 9.983 9.943 9.9 9.854 9.805 9.754 9.701 9.645 9.587 9.527 9.465 9.401 9.336 9.269 9.201 9.131 9.059 8.987 8.913 8.839 8.763 8.687 8.609 8.531 8.453 8.373 8.294 8.213 8.133 8.052 7.971 7.889 7.808 7.726 7.644 7.562 7.481 7.399 7.317 7.236 7.155 7.074 6.993 6.912 6.832 6.752 6.673 6.594 6.515 6.437 6.359 6.282 6.205 6.129 6.053 5.978 5.904 5.83 5.756 5.683 5.611 5.539 5.468 5.398 5.328 5.259 5.191 5.123 5.056 4.989 4.924 4.859 4.794 4.73 4.667 4.605 4.543 4.482 4.422 4.362 4.303 4.245 4.187 4.13 4.073 4.018 3.963 3.908 3.855 3.801 3.749 3.697 3.646 3.595 3.546 3.496 3.448 3.399 3.352 3.305 3.259 3.213 3.168 3.124 3.08

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.97" PeakHeight="110.0" Num="3" Error="0.0">
-30.17 12.665 -2.945
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.97" EndFrequency="10.2" PeakHeight="427.499" Num="5" zHalfNm="280.131" Error="3.88">
-277.547 -45.564 21.913 -6.959 0.713
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.055" Depth="0.122"/>
<TopsideChapman PeakHeight="427.499" PeakDensity="1290818.9" PeakScaleHeight="106.482" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
