<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 13:40:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: 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) 13:40:00</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">
FF202602901291340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="8.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.845" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.321" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.000" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" 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="34" Val="105.000" Name="h`Es" 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="8.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="441.163" 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="3.284" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.311" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="300.511" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="213.417" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.855" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.350" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="97.490" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.103" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.457" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="163.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 315.000 320.000 325.000 325.000 330.000 335.000 345.000 345.000 345.000 350.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 377.500 380.000 380.000 385.000 385.000 385.000 385.000 387.500 390.000 393.333 396.667 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 431.540 433.340 435.469 438.029 441.163 445.092 450.160 456.945 466.501
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 57 57 57 54 48 54 54 54 48 57 60 57 60 60 60 60 63 0 63 63 60 63 60 60 0 60 0 0 51 57 63 66 57 60 63 63 63 63 66 66 63 69 69 66 66 66 66 66 63 66 57 66 54 63 54 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 -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 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 51 54 51 54 0 0 0 0 48 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 0.390625 1.171875 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -2.734375 -0.390625 0.390625 1.953125
</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" >
89.499 90.0 95.0 100.0 105.0 110.0 111.989 113.977 115.0 115.966 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.511 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.209 2.842 3.177 3.284 3.162 3.162 3.225 3.284 3.449 3.645 3.827 3.997 4.155 4.306 4.449 4.586 4.72 4.85 4.977 5.103 5.227 5.349 5.472 5.594 5.716 5.838 5.961 6.085 6.211 6.338 6.467 6.598 6.732 6.869 7.01 7.155 7.305 7.46 7.62 7.787 7.961 8.139 8.316 8.471 8.549 8.55 8.545 8.529 8.503 8.467 8.421 8.366 8.304 8.234 8.157 8.074 7.985 7.891 7.792 7.69 7.583 7.473 7.361 7.246 7.129 7.01 6.89 6.769 6.647 6.524 6.401 6.279 6.156 6.034 5.912 5.791 5.671 5.552 5.434 5.317 5.202 5.087 4.975 4.864 4.754 4.646 4.54 4.435 4.332 4.231 4.132 4.035 3.939 3.845 3.753 3.663 3.575 3.488 3.403 3.32 3.239 3.16 3.082 3.006 2.931 2.859 2.788 2.718 2.65 2.584 2.519 2.456 2.394 2.334 2.275 2.217 2.161 2.107 2.053 2.001 1.95 1.901 1.852 1.805 1.759 1.714 1.67 1.627 1.586 1.545 1.505 1.467 1.429 1.392 1.357 1.322 1.288 1.255 1.222 1.191 1.16 1.13 1.101 1.073 1.045 1.018 0.992 0.966 0.941 0.917 0.893 0.87 0.848 0.826 0.805 0.784 0.763 0.744 0.724 0.706 0.687 0.67 0.652 0.635 0.619 0.603 0.587 0.572 0.557 0.543 0.529 0.515 0.502 0.489 0.476 0.464 0.452 0.44 0.429 0.418 0.407 0.396 0.386 0.376 0.366 0.357

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.284" PeakHeight="110.0" Num="3" Error="0.0">
-30.423 13.036 -3.114
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.284" EndFrequency="8.55" PeakHeight="300.511" Num="5" zHalfNm="213.417" Error="1.907">
-141.548 -65.047 23.743 -0.714 -0.979
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.966" Depth="0.122"/>
<TopsideChapman PeakHeight="300.511" PeakDensity="906978.94" PeakScaleHeight="59.457" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
