<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 10:00:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Multiple candidates for F2x cusp</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) 10:00:00</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">
FF202602901291000009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="8.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.066" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.366" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.300" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.900" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.210" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="99.568" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.377" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.255" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" 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="2.078" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="285.601" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="208.094" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.037" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.650" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="106.349" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.852" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.954" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.760" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.500" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="63">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 286.250 287.500 288.750 290.000 291.250 292.500 293.750 295.000 295.000 300.000 300.000 300.000 300.000 300.000 300.000 303.333 306.667 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 360.000 365.000 365.000 370.000 375.000 379.758 385.554 392.769 401.999 414.224 431.183 456.287 497.257 576.084
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 57 0 60 66 0 0 78 0 0 0 66 0 0 0 66 69 0 57 63 60 0 72 0 0 48 54 45 60 66 66 63 57 63 0 0 57 63 72 69 75 69 75 72 75 75 75 75 72 69 69 72 72 72 72 72 72 66 72 69 63 0 45
</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 0.390625 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.9 1.95 2.0 2.05 2.1 2.15 2.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
99.568 100.876 102.365 104.095 106.167 108.767 112.309
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 63 0 0 0 60
</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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 106.667 103.333 100.000 105.000 105.000 105.000 105.000 110.000 110.000 110.000 107.500 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 115.000 113.750 112.500 111.250 110.000 108.750 107.500 106.250 105.000 105.000 105.000 105.000 105.000 112.500 120.000 125.000 120.000 115.000 115.000 125.000 120.000 115.000 110.000 105.000 105.000 110.000 110.000 115.000 112.500 110.000 110.000 111.667 113.333 115.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 117.500 115.000 115.000 115.000 120.000 120.000 117.500 115.000 115.000 110.000 130.000 130.000 130.000 125.000 120.000 115.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 107.500 105.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 107.500 105.000 105.000 105.000 105.000 105.000 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 66 63 66 0 0 69 63 0 63 0 57 75 0 78 69 0 75 78 69 63 0 0 0 0 60 0 0 69 66 81 75 75 66 63 60 0 0 63 57 57 60 0 75 69 66 69 57 0 63 63 0 0 60 0 0 0 63 60 57 54 0 0 57 51 51 54 0 48 0 48 45 48 45 45 0 48 51 48 51 51 0 45 48 0 48 54 0 0 0 0 0 0 0 0 48 0 0 0 51 0 0 51 45 0 54 0 48 0 0 45 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 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 -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 1.953125 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 -1.953125 1.171875 0.390625 1.171875 0.390625 1.171875 -0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 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" >
90.0 95.0 98.377 100.0 105.0 106.159 110.0 113.942 115.0 120.0 121.724 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 285.601 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.015 2.21 2.204 2.11 2.071 2.071 2.071 2.09 2.179 2.21 2.326 2.516 2.72 2.932 3.151 3.373 3.598 3.824 4.052 4.282 4.513 4.746 4.981 5.217 5.455 5.693 5.933 6.172 6.411 6.647 6.88 7.107 7.328 7.538 7.737 7.921 8.088 8.236 8.361 8.461 8.535 8.582 8.6 8.6 8.595 8.579 8.551 8.513 8.464 8.407 8.342 8.268 8.187 8.1 8.007 7.909 7.806 7.698 7.587 7.473 7.355 7.236 7.114 6.991 6.866 6.741 6.615 6.488 6.361 6.235 6.109 5.983 5.858 5.734 5.61 5.488 5.368 5.248 5.13 5.014 4.899 4.786 4.674 4.565 4.457 4.351 4.247 4.145 4.044 3.946 3.849 3.755 3.662 3.572 3.483 3.396 3.311 3.228 3.146 3.067 2.989 2.913 2.839 2.766 2.696 2.626 2.559 2.493 2.429 2.366 2.305 2.245 2.187 2.13 2.075 2.021 1.968 1.917 1.867 1.818 1.77 1.724 1.679 1.635 1.592 1.55 1.509 1.469 1.431 1.393 1.356 1.321 1.286 1.252 1.219 1.187 1.155 1.125 1.095 1.066 1.038 1.01 0.984 0.958 0.932 0.907 0.883 0.86 0.837 0.815 0.793 0.772 0.752 0.732 0.713 0.694 0.675 0.657 0.64 0.623 0.606 0.59 0.575 0.559 0.544 0.53 0.516 0.502 0.489 0.476 0.463 0.451 0.439 0.427 0.416 0.405 0.394 0.384 0.373 0.363 0.354 0.344 0.335 0.326 0.318 0.309 0.301

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.21" PeakHeight="98.377" Num="3" Error="1.212">
-12.121 4.756 -1.012
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.21" EndFrequency="8.6" PeakHeight="285.601" Num="5" zHalfNm="208.094" Error="2.594">
-156.595 -10.731 4.079 -0.204 -0.426
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.347" Depth="0.139"/>
<TopsideChapman PeakHeight="285.601" PeakDensity="917617.9" PeakScaleHeight="57.954" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
