<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 23:20:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% 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, Trace overlaps while constructing baseline</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" >
2026.01.27 (027) 23:20:00</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">
FF202602701272320009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.804" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.115" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="457.208" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="402.100" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="371.084" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.077" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="49.407" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.014" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.196" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="67.750" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 387.500 385.000 385.000 385.000 388.333 391.667 395.000 400.000 401.667 403.333 405.000 405.000 405.000 410.000 410.000 410.000 412.500 415.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 435.000 435.500 436.000 436.500 437.000 437.500 438.000 438.500 439.000 439.500 440.000 442.500 445.000 445.000 445.000 441.667 438.333 435.000 440.000 440.000 440.000 440.000 440.000 440.000 438.333 436.667 435.000 430.000 425.000 425.000 425.000 410.000 405.000 405.000 405.000 400.000 401.667 403.333 405.000 406.667 408.333 410.000 411.667 413.333 415.000 415.000 415.000 420.000 420.000 420.000 425.000 427.500 430.000 435.000 445.000 450.000 450.427 450.945 451.590 452.413 453.499 455.000 457.208 460.777 467.527 485.128
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 66 66 66 0 66 0 60 60 57 0 0 57 60 0 0 69 69 54 57 60 63 57 57 57 57 54 0 60 0 54 0 0 57 60 54 54 54 54 54 54 54 54 51 57 54 51 0 60 51 60 0 54 0 60 60 63 57 0 54 54 57 0 54 51 0 60 57 66 54 66 54 60 54 0 0 0 0 0 57 0 51 63 63 57 60 60 63 63 0 54 51 51 51 51 51 51 54 51 57 54 51 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 0.390625 0.390625 0.390625 0.390625 -1.171875 -0.390625 -1.171875 0.390625 0.390625 1.171875 0.390625 -0.390625 -0.390625 1.171875 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 1.171875 0.390625 -0.390625 -1.171875 -1.171875 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 -1.171875 -2.734375 2.734375 -2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.953125 -1.171875 1.953125 -1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 -2.734375 0.390625 1.171875 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 0.390625 2.734375 1.171875 0.390625 1.171875 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="130">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.14 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.281 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.421 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 402.1 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.31 0.282 0.244 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.23 0.253 0.275 0.298 0.321 0.343 0.354 0.385 0.465 0.571 0.695 0.827 0.961 1.095 1.229 1.365 1.502 1.641 1.783 1.928 2.076 2.228 2.385 2.547 2.714 2.887 3.066 3.253 3.446 3.648 3.859 4.08 4.311 4.555 4.811 5.083 5.371 5.678 6.007 6.361 6.745 7.164 7.622 8.113 8.539 8.6 8.587 8.51 8.371 8.182 7.952 7.692 7.407 7.107 6.797 6.481 6.165 5.851 5.543 5.242 4.951 4.669 4.399 4.14 3.893 3.659 3.436 3.225 3.025 2.836 2.659 2.491 2.334 2.185 2.046 1.915 1.793 1.678 1.57 1.469 1.374 1.285 1.202 1.124 1.052 0.983 0.92 0.86 0.804 0.752 0.703 0.657 0.615 0.575 0.537 0.502 0.47 0.439 0.41 0.384 0.359 0.335 0.314 0.293 0.274 0.256 0.24 0.224 0.209

</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="8.6" PeakHeight="402.1" Num="5" zHalfNm="371.084" Error="4.77">
-151.565 -65.904 36.131 -7.344 -0.997
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.421" Depth="0.154"/>
<TopsideChapman PeakHeight="402.1" PeakDensity="917617.9" PeakScaleHeight="23.196" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
