<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 15:20:00.000"
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 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" >
2026.01.30 (030) 15:20:00</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">
FF202603001301520009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="8.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.673" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.985" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.350" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="3.370" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.351" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="328.347" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.816" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.356" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.200" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="127.065" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.580" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.351" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="188.820" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="59">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
370.000 372.500 375.000 375.000 375.000 375.000 376.250 377.500 378.750 380.000 381.667 383.333 385.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 415.000 415.000 415.000 420.000 420.000 420.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 460.000 465.000 475.000 481.277 488.435 496.672 506.254 517.539 531.024 547.424 567.796
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 54 48 0 51 0 0 0 51 0 0 45 0 48 0 45 48 45 57 60 57 0 48 48 0 57 54 48 45 54 54 54 57 60 60 57 48 51 45 54 51 54 48 54 57 60 60 60 63 60 54 0 0 0 0 0 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 1.953125 2.734375 0.390625 1.171875 -1.171875 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 105.000 105.000 105.000 110.000 110.000 108.333 106.667 105.000 105.000 106.000 107.000 108.000 109.000 110.000 115.000 114.167 113.333 112.500 111.667 110.833 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 48 0 48 57 57 0 0 48 60 0 0 0 0 0 45 0 51 0 0 0 48 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
</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" >
89.487 90.0 95.0 100.0 105.0 110.0 111.635 113.269 114.904 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 328.347 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.267 2.916 3.26 3.37 3.247 3.247 3.37 3.373 3.54 3.7 3.85 3.993 4.128 4.259 4.385 4.507 4.627 4.744 4.86 4.975 5.089 5.203 5.317 5.431 5.545 5.66 5.777 5.894 6.013 6.134 6.257 6.382 6.51 6.64 6.774 6.91 7.049 7.191 7.336 7.482 7.63 7.778 7.924 8.065 8.197 8.317 8.42 8.503 8.561 8.594 8.6 8.6 8.594 8.581 8.562 8.537 8.505 8.468 8.426 8.379 8.327 8.271 8.211 8.146 8.079 8.007 7.933 7.856 7.777 7.695 7.61 7.524 7.436 7.347 7.256 7.164 7.072 6.978 6.883 6.788 6.693 6.597 6.501 6.404 6.308 6.212 6.116 6.021 5.926 5.831 5.737 5.643 5.55 5.458 5.366 5.276 5.186 5.097 5.008 4.921 4.835 4.749 4.665 4.582 4.5 4.418 4.338 4.259 4.181 4.105 4.029 3.954 3.881 3.808 3.737 3.667 3.598 3.53 3.463 3.397 3.332 3.269 3.206 3.144 3.084 3.025 2.966 2.909 2.852 2.797 2.742 2.689 2.636 2.585 2.534 2.485 2.436 2.388 2.341 2.295 2.25 2.205 2.162 2.119 2.077 2.036 1.995 1.956 1.917 1.879 1.841 1.805 1.769 1.733 1.699 1.665 1.631 1.599 1.567 1.536 1.505 1.475 1.445 1.416 1.388 1.36 1.333 1.306 1.28 1.254 1.229 1.204 1.18 1.156 1.133 1.11 1.088 1.066 1.044 1.023 1.003 0.982 0.963 0.943 0.924 0.905

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.37" PeakHeight="110.0" Num="3" Error="0.0">
-30.486 13.13 -3.157
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.37" EndFrequency="8.6" PeakHeight="328.347" Num="5" zHalfNm="222.816" Error="4.91">
-177.59 -50.271 12.417 3.498 -1.497
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.904" Depth="0.123"/>
<TopsideChapman PeakHeight="328.347" PeakDensity="917617.9" PeakScaleHeight="76.351" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
