<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-28 -028 22:00:00.000"
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="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: 95% 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" >
2026.01.28 (028) 22:00:00</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">
FF202602801282200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.243" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.279" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="7.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="615.000" 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="0.416" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="504.067" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="411.807" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.007" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="135.243" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.453" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.327" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="139.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 390.000 391.250 392.500 393.750 395.000 390.000 390.000 391.667 393.333 395.000 400.000 400.000 400.556 401.111 401.667 402.222 402.778 403.333 403.889 404.444 405.000 410.000 411.667 413.333 415.000 416.667 418.333 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 427.000 429.000 431.000 433.000 435.000 436.667 438.333 440.000 441.667 443.333 445.000 446.667 448.333 450.000 451.667 453.333 455.000 460.000 460.000 460.000 460.000 463.333 466.667 470.000 475.000 475.000 475.000 477.500 480.000 482.500 485.000 480.000 485.000 485.000 485.000 490.000 492.727 495.455 498.182 500.909 503.636 506.364 509.091 511.818 514.545 517.273 520.000 515.000 517.500 520.000 522.500 525.000 535.000 535.000 540.000 542.500 545.000 547.500 550.000 555.000 557.500 560.000 565.000 570.000 570.000 573.750 577.500 581.250 585.000 590.000 590.000 595.000 600.000 610.000 610.000 615.000 625.000 633.879 644.208 656.374 670.914 688.599 710.572 738.609
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 66 0 0 0 60 60 66 0 0 69 66 0 0 0 0 0 0 0 0 0 54 60 0 0 0 66 0 66 63 69 66 66 69 0 0 60 0 0 0 0 0 0 0 60 0 48 0 0 0 60 0 0 75 69 0 0 0 0 0 63 57 57 63 0 0 0 60 0 72 57 0 66 0 0 66 0 0 0 0 0 0 0 57 66 60 66 0 66 60 69 72 0 69 51 66 57 0 60 0 54 48 0 0 0 72 66 63 66 69 54 69 69 63 72 66 54 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.171875 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.953125 0.390625 2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.459 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.082 140.0 145.0 150.0 155.0 160.0 165.0 168.163 170.0 175.0 180.0 185.0 190.0 195.0 197.245 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 504.067 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.275 0.36 0.403 0.416 0.411 0.397 0.371 0.332 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.251 0.288 0.325 0.362 0.399 0.416 0.447 0.501 0.554 0.608 0.664 0.721 0.781 0.843 0.909 0.977 1.049 1.125 1.204 1.288 1.375 1.467 1.564 1.665 1.771 1.882 1.998 2.119 2.246 2.377 2.514 2.655 2.802 2.954 3.11 3.272 3.438 3.608 3.783 3.962 4.144 4.33 4.519 4.711 4.904 5.1 5.297 5.494 5.692 5.888 6.084 6.277 6.466 6.652 6.832 7.005 7.171 7.329 7.476 7.612 7.735 7.844 7.938 8.016 8.076 8.119 8.144 8.15 8.15 8.144 8.131 8.11 8.082 8.047 8.007 7.96 7.907 7.85 7.788 7.721 7.65 7.575 7.497 7.416 7.331 7.245 7.155 7.064 6.971 6.876 6.78 6.683 6.585 6.486 6.387 6.287 6.187 6.086 5.986 5.886 5.786 5.686 5.587 5.488 5.39 5.293 5.196 5.101 5.006 4.912 4.819 4.727 4.636 4.547 4.458 4.371 4.285 4.2 4.116 4.033 3.952 3.872 3.793 3.716 3.64 3.565 3.491 3.419 3.348 3.278 3.21 3.142 3.076 3.011 2.948 2.885 2.824 2.764 2.705 2.647 2.59 2.535 2.48 2.427 2.375 2.323 2.273 2.224 2.176 2.128 2.082 2.037 1.992 1.949 1.906 1.865 1.824 1.784 1.745 1.707 1.669 1.633 1.597 1.562 1.527 1.494 1.461 1.429

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.416" PeakHeight="110.0" Num="3" Error="0.0">
-20.622 3.328 -0.247
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.416" EndFrequency="8.15" PeakHeight="504.067" Num="5" zHalfNm="411.807" Error="3.838">
-290.431 -25.864 8.907 -0.532 1.098
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.245" Depth="0.216"/>
<TopsideChapman PeakHeight="504.067" PeakDensity="824100.5" PeakScaleHeight="69.327" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
